diff --git a/compatibility/2.3.nom b/compatibility/2.3.nom
index a07729c..1664429 100644
--- a/compatibility/2.3.nom
+++ b/compatibility/2.3.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.11
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <2.3 to Nomsu 2.3
     
diff --git a/compatibility/2.4.nom b/compatibility/2.4.nom
index ef78a89..dbc6517 100644
--- a/compatibility/2.4.nom
+++ b/compatibility/2.4.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <2.4 to Nomsu 2.4
     
diff --git a/compatibility/2.5.5.5.nom b/compatibility/2.5.5.5.nom
index 9bbee06..6da70d4 100644
--- a/compatibility/2.5.5.5.nom
+++ b/compatibility/2.5.5.5.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <2.5.5.5 to Nomsu 2.5.5.5
     
diff --git a/compatibility/2.5.nom b/compatibility/2.5.nom
index 816691e..a1a33b7 100644
--- a/compatibility/2.5.nom
+++ b/compatibility/2.5.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <2.5 to Nomsu 2.5
     
diff --git a/compatibility/2.nom b/compatibility/2.nom
index 2ca4526..311002d 100644
--- a/compatibility/2.nom
+++ b/compatibility/2.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu 1 to Nomsu 2
     
diff --git a/compatibility/3.5.5.6.nom b/compatibility/3.5.5.6.nom
index aebd0a5..de6cc1f 100644
--- a/compatibility/3.5.5.6.nom
+++ b/compatibility/3.5.5.6.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <3.5.5.6 to Nomsu 3.5.5.6
     
diff --git a/compatibility/3.6.nom b/compatibility/3.6.nom
index 1a9edb1..fad8a32 100644
--- a/compatibility/3.6.nom
+++ b/compatibility/3.6.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <3.6 to 3.6
     
diff --git a/compatibility/3.7.nom b/compatibility/3.7.nom
index 874b113..26b643f 100644
--- a/compatibility/3.7.nom
+++ b/compatibility/3.7.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <3.7 to 3.7
     
diff --git a/compatibility/3.8.nom b/compatibility/3.8.nom
index 583b52b..d70e6e8 100644
--- a/compatibility/3.8.nom
+++ b/compatibility/3.8.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <3.8 to 3.8 (Text method changes)
     
diff --git a/compatibility/3.nom b/compatibility/3.nom
index 69f8d25..a1ce99b 100644
--- a/compatibility/3.nom
+++ b/compatibility/3.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <=2 to Nomsu 3
     
diff --git a/compatibility/4.10.12.7.nom b/compatibility/4.10.12.7.nom
index 2e42bdc..fe1511c 100644
--- a/compatibility/4.10.12.7.nom
+++ b/compatibility/4.10.12.7.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <4.10.12.7 to 4.10.12.7
 use "compatibility/compatibility.nom"
@@ -56,20 +56,25 @@ upgrade %tree to "4.10.12.7" as:
             if ((%first_chunk.%i.type == "Action") and (%first_chunk.%i.stub == "use")):
                 %has_use = (yes)
             ..else:
-                if %has_use: go to (insert chunk)
+                if %has_use:
+                    go to (insert chunk)
             %i += 1
         return
-
         === (insert chunk) ===
         [%chunk1, %chunk2] = [..]
             SyntaxTree {type: "Block", source: %first_chunk.source}
             SyntaxTree {type: "Block", source: %first_chunk.source}
+        
         for %j in 1 to (%i - 1):
             %chunk1.%j = %first_chunk.%j
+        
         for %j in %i to (size of %first_chunk):
             %chunk2.(%j - %i + 1) = %first_chunk.%j
-
-        %new_tree = (SyntaxTree {source: %tree.source, type: "FileChunks", 1: %chunk1, 2: %chunk2})
+        
+        %new_tree = (..)
+            SyntaxTree {source: %tree.source, type: "FileChunks", 1: %chunk1, 2: %chunk2}
+        
         for %i in 2 to (size of %tree):
             %new_tree.(%i + 1) = %tree.%i
+        
         return %new_tree
diff --git a/compatibility/4.11.nom b/compatibility/4.11.nom
index 05edfea..71bf3ee 100644
--- a/compatibility/4.11.nom
+++ b/compatibility/4.11.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.11
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <4.11 to Nomsu 4.11
     (overhaul of function literals, deleting (if all of ...), etc. shorthand)
@@ -14,7 +14,6 @@ upgrade action "call 1 with" to "4.11" via (..)
         for %arg in %tree.4 at %i:
             %tree2.(%i + 1) = %arg
         return (SyntaxTree %tree2)
-
 upgrade action (-> %yield_value) to "4.11" as (yield %yield_value)
 
 # Replace set {%x:1, %y:2} with [%x, %y] = [1, 2]
@@ -29,10 +28,15 @@ upgrade action "set" to "4.11" via (..)
         return (SyntaxTree {type: "Action", source: %tree.source, 1: %lhs, 2: "=", 3: %rhs})
 
 # Changing filesystem API:
-upgrade action (for file %f in %path %body) to "4.11" as (for %f in (files for %path) %body)
-upgrade action (%expr for file %f in %path) to "4.11" as [: for %f in (files for %path): add %expr]
+upgrade action (for file %f in %path %body) to "4.11" as (..)
+    for %f in (files for %path) %body
+
+upgrade action (%expr for file %f in %path) to "4.11" as [..]
+    : for %f in (files for %path): add %expr
+
 upgrade action (line %n in %text) to "4.11" as (%text::line %n)
-upgrade action (line number of %pos in %text) to "4.11" as (%text::line number at %pos)
+upgrade action (line number of %pos in %text) to "4.11" as (..)
+    %text::line number at %pos
 
 # Deprecating shorthand functions:
 upgrade action [if all of %items %body, if all of %items then %body] to "4.11" as (..)
diff --git a/compatibility/4.8.10.nom b/compatibility/4.8.10.nom
index 9049830..f20886f 100644
--- a/compatibility/4.8.10.nom
+++ b/compatibility/4.8.10.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <4.8.10 to 4.8.10 (renaming "action" -> "means")
 use "compatibility/compatibility.nom"
diff --git a/compatibility/4.9.nom b/compatibility/4.9.nom
index ab58a86..5dc0d29 100644
--- a/compatibility/4.9.nom
+++ b/compatibility/4.9.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines upgrades from Nomsu <4.9 to 4.9
 use "compatibility/compatibility.nom"
diff --git a/compatibility/compatibility.nom b/compatibility/compatibility.nom
index 23ec703..5be8eeb 100644
--- a/compatibility/compatibility.nom
+++ b/compatibility/compatibility.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file contains code for defining ways to upgrade code between different versions
     of Nomsu.
@@ -105,7 +105,7 @@ externally (%tree upgraded) means (..)
     %tree upgraded from (%tree.version or (Nomsu version)) to (Nomsu version)
 
 externally (use %path from version %version) means:
-    for file %filename in %path:
+    for %filename in (files for %path):
         if (=lua "LOADED[\%filename]"):
             do next %filename
         %file = (read file %filename)
diff --git a/core/collections.nom b/core/collections.nom
index a586882..9272d13 100644
--- a/core/collections.nom
+++ b/core/collections.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file contains code that supports manipulating and using collections like lists
     and dictionaries.
diff --git a/core/control_flow.nom b/core/control_flow.nom
index 9432a92..27ff96d 100644
--- a/core/control_flow.nom
+++ b/core/control_flow.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file contains compile-time actions that define basic control flow structures
     like "if" statements and loops.
@@ -54,7 +54,7 @@ test:
 ..all compile to:
     #   If %when_true_expr is guaranteed to be truthy, we can use Lua's idiomatic
         equivalent of a conditional expression: (cond and if_true or if_false)
-    if {"Text", "List", "Dict", "Number"}.(%when_true_expr.type):
+    if {Text, List, Dict, Number}.(%when_true_expr.type):
         return (Lua "(\(%condition as lua expr) and \(%when_true_expr as lua expr) or \(%when_false_expr as lua expr))")
     ..else:
         #   Otherwise, need to do an anonymous inline function (yuck, too bad lua 
diff --git a/core/coroutines.nom b/core/coroutines.nom
index 0a625c2..73b6854 100644
--- a/core/coroutines.nom
+++ b/core/coroutines.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines the code that creates and manipulates coroutines
     
@@ -13,16 +13,13 @@ test:
         ->:
             yield 4
             yield 5
-            repeat 3 times: yield 6
-    
+            repeat 3 times:
+                yield 6
     %nums = []
     for % in coroutine %co:
         %nums::add %
-    
     assume (%nums == [4, 5, 6, 6, 6]) or barf "Coroutine iteration failed"
-
-
-    %d = {x:0}
+    %d = {x: 0}
     %co2 = (..)
         coroutine:
             %d.x += 1
@@ -30,12 +27,9 @@ test:
             %d.x += 1
             yield
             %d.x += 1
-    repeat while ((coroutine status of %co2) != "dead"):
-        resume %co2
+    repeat while ((coroutine status of %co2) != "dead"): resume %co2
     assume %d.x == 3
-    
 (coroutine %body) parses as (coroutine from (-> %body))
-
 (for % in coroutine %co %body) compiles to "\
     ..for \(% as lua expr) in coroutine_wrap(\(%co as lua expr)) do
         \(%body as lua)
diff --git a/core/errors.nom b/core/errors.nom
index 12a5b29..aa5346b 100644
--- a/core/errors.nom
+++ b/core/errors.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file contains basic error reporting code
     
diff --git a/core/id.nom b/core/id.nom
index 7de38f9..9ee961d 100644
--- a/core/id.nom
+++ b/core/id.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     A simple UUID function based on RFC 4122: http://www.ietf.org/rfc/rfc4122.txt
     
diff --git a/core/io.nom b/core/io.nom
index c667466..04efb91 100644
--- a/core/io.nom
+++ b/core/io.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file contains basic input/output code
     
diff --git a/core/math.nom b/core/math.nom
index 38fb984..ae01620 100644
--- a/core/math.nom
+++ b/core/math.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines some common math literals and functions
     
@@ -72,16 +72,16 @@ externally [all of %items, all %items] all mean:
 
 #[all of %items, all %items] all compile to:
     unless (%items.type is "List"):
-        return \(all of %items)
+    return \(all of %items)
     
     if ((size of %items) == 0):
-        return (Lua "true")
+    return (Lua "true")
     
     %lua = (Lua "(")
     %lua::add [: for % in %items: add (% as lua expr)] joined with " and "
     %lua::append ")"
     return %lua
-
+    
 [not all of %items, not all %items] all parse as (not (all of %items))
 externally [any of %items, any %items] all mean:
     for % in %items:
@@ -91,16 +91,16 @@ externally [any of %items, any %items] all mean:
 
 #[any of %items, any %items] all compile to:
     unless (%items.type is "List"):
-        return \(any of %items)
+    return \(any of %items)
     
     if ((size of %items) == 0):
-        return (Lua "false")
+    return (Lua "false")
     
     %lua = (Lua "(")
     %lua::add [: for % in %items: add (% as lua expr)] joined with " or "
     %lua::append ")"
     return %lua
-
+    
 [none of %items, none %items] all parse as (not (any of %items))
 
 # Sum/product
@@ -112,16 +112,16 @@ externally [sum of %items, sum %items] all mean:
 
 #[sum of %items, sum %items] all compile to:
     unless (%items.type is "List"):
-        return \(sum of %items)
+    return \(sum of %items)
     
     if ((size of %items) == 0):
-        return (Lua "0")
+    return (Lua "0")
     
     %lua = (Lua "(")
     %lua::add [: for % in %items: add (% as lua expr)] joined with " + "
     %lua::append ")"
     return %lua
-
+    
 externally [product of %items, product %items] all mean:
     %prod = 1
     for % in %items:
@@ -130,16 +130,16 @@ externally [product of %items, product %items] all mean:
 
 #[product of %items, product %items] all compile to:
     unless (%items.type is "List"):
-        return \(product of %items)
+    return \(product of %items)
     
     if ((size of %items) == 0):
-        return (Lua "1")
+    return (Lua "1")
     
     %lua = (Lua "(")
     %lua::add [: for % in %items: add (% as lua expr)] joined with " * "
     %lua::append ")"
     return %lua
-
+    
 externally [avg of %items, average of %items] all mean (..)
     (sum of %items) / (size of %items)
 
diff --git a/core/metaprogramming.nom b/core/metaprogramming.nom
index fe97527..c89b1df 100644
--- a/core/metaprogramming.nom
+++ b/core/metaprogramming.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This File contains actions for making actions and compile-time actions and some helper
     functions to make that easier.
@@ -253,16 +253,16 @@ test:
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 [%action parses as %body] all parse as ([%action] all parse as %body)
+
 #(%tree as lua expr) compiles to "compile(\(=lua "compile(\%tree, true)"), true)"
 externally (%tree as lua expr) means:
     lua> "\
         ..local tree_lua = compile(\%tree)
         if \%tree.type == 'Block' then
-            tree_lua = LuaCode:from(\%tree.source, '(function()\n    ', tree_lua, '\nend)()')
+            tree_lua = LuaCode:from(\%tree.source, '(function()\\n    ', tree_lua, '\\nend)()')
         end
         return tree_lua"
 
-
 externally [%var as lua identifier, %var as lua id] all mean:
     lua> "\
         ..if lua_type_of(\%var) == 'string' then return \%var:as_lua_id()
@@ -283,8 +283,8 @@ test:
     assume (extra args 1 2 3) == [1, 2, 3]
     (third arg (*extra arguments*)) means (select 3 (*extra arguments*))
     assume (third arg 5 6 7 8) == 7
-(*extra arguments*) compiles to "..."
 
+(*extra arguments*) compiles to "..."
 (% is syntax tree) compiles to "SyntaxTree:is_instance(\(% as lua expr))"
 externally (% is %kind syntax tree) means (..)
     =lua "SyntaxTree:is_instance(\%) and \%.type == \%kind"
@@ -394,8 +394,10 @@ test:
     ..compile(\(%block as lua))"
 
 test:
-    (foo) means: return 100 200 300
+    (foo) means:
+        return 100 200 300
     assume (select 2 (foo)) == 200
+
 # Return statement is wrapped in a do..end block because Lua is unhappy if you
     put code after a return statement, unless you wrap it in a block.
 (return (*extra arguments*)) compiles to:
diff --git a/core/operators.nom b/core/operators.nom
index 2f79b8f..1a28a6a 100644
--- a/core/operators.nom
+++ b/core/operators.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file contains definitions of operators like "+" and "and".
     
@@ -51,7 +51,8 @@ test:
                 if #\%value ~= #\%var then
                     compile_error_at(\%value,
                         "This assignment has too "..(#\%value > #\%var and "many" or "few").." values.",
-                        "Make sure it has the same number of values on the left and right hand side of the '=' operator.")
+                        "Make sure it has the same number of values on the left and right hand side of the '\
+        ..=' operator.")
                 end
                 for i, \%val in ipairs(\%value) do
                     if i > 1 then lua:append(", ") end
@@ -149,7 +150,6 @@ test:
     assume (0 <= (one) <= 2) or barf "Three-way chained comparison failed."
     assume (%calls == 1) or barf "\
         ..Three-way comparison evaluated middle value multiple times"
-
 (%x < %y < %z) parses as (((%a %b %c) -> ((%a < %b) and (%b < %c))) %x %y %z)
 (%x <= %y < %z) parses as (((%a %b %c) -> ((%a <= %b) and (%b < %c))) %x %y %z)
 (%x < %y <= %z) parses as (((%a %b %c) -> ((%a < %b) and (%b <= %c))) %x %y %z)
diff --git a/core/text.nom b/core/text.nom
index 62b6656..1245235 100644
--- a/core/text.nom
+++ b/core/text.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file contains some definitions of text escape sequences, including ANSI console
     color codes.
@@ -50,6 +50,7 @@ test:
 
 test:
     assume (0xDEADBEEF as hex) == "0xDEADBEEF"
+
 externally (%num as hex) means:
     if (%num < 0):
         return ("-0x%X"::formatted with (- %num))
diff --git a/examples/how_do_i.nom b/examples/how_do_i.nom
index bae1379..39e9bdb 100644
--- a/examples/how_do_i.nom
+++ b/examples/how_do_i.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 # How do I...
 # Write a comment? Put a # and go till the end of the line
 # How do I write a multi-line comment?
@@ -65,7 +65,7 @@ say "\
     Similarly, you can put a long interpolated indented value like: \(..)
         1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9
     .. between a backslash and two periods."
-
+    
 say "Single-line text can contain escape sequences like \", \\, \000, and \n"
 
 # How do I define a list?
diff --git a/lib/base64.nom b/lib/base64.nom
index ea951c8..04003a2 100644
--- a/lib/base64.nom
+++ b/lib/base64.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines actions for encoding/decoding base 64, as specified in:
     https://tools.ietf.org/html/rfc4648
diff --git a/lib/consolecolor.nom b/lib/consolecolor.nom
index 0114d01..2c3665a 100644
--- a/lib/consolecolor.nom
+++ b/lib/consolecolor.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines actions for ANSI console color escape codes.
     
diff --git a/lib/file_hash.nom b/lib/file_hash.nom
index 547afb5..bda79d5 100644
--- a/lib/file_hash.nom
+++ b/lib/file_hash.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines some actions for hashing files and looking up files by hash.
     
@@ -44,7 +44,7 @@ if %use_sha1:
         return "\%hash"
 
 externally (file with hash %hash) means:
-    for file %filename in ".":
+    for %filename in (files for "."):
         %contents = (read file %filename)
         %file_hash = (hash %contents)
         if (%file_hash == %hash):
diff --git a/lib/object.nom b/lib/object.nom
index 103f2d7..94ca9f0 100644
--- a/lib/object.nom
+++ b/lib/object.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file contains the implementation of an Object-Oriented programming system.
     
diff --git a/lib/os.nom b/lib/os.nom
index 5fb2a1f..9f9f637 100644
--- a/lib/os.nom
+++ b/lib/os.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines some actions that interact with the operating system and filesystem.
     
@@ -7,13 +7,15 @@ test:
 
 externally (files for %path) means:
     %files = (=lua "Files.list(\%path)")
-    if %files: %files = (List %files)
+    if %files:
+        %files = (List %files)
     return %files
 
 externally (nomsu files for %path) means:
     for %nomsupath in (%package.nomsupath::all matches of "[^;]+"):
-        %files = (files for "\%nomsupath/\%path")
-        if %files: return %files
+        %files = (files for "\(%nomsupath)/\%path")
+        if %files:
+            return %files
 
 externally (sh> %cmd) means:
     lua> "\
@@ -26,20 +28,6 @@ test:
     read file "lib/os.nom"
 
 externally (read file %filename) means (=lua "Files.read(\%filename)")
-test:
-    for file %f in "core": do nothing
-
-(for file %f in %path %body) parses as (for %f in (nomsu files for %path) %body)
-
-# TODO: deprecate
-#(%expr for file %f in %path) compiles to "\
-    ..(function()
-        local ret = List{}
-        for i,\(%f as lua expr) in Files.walk(\(%path as lua expr)) do
-            ret[#ret+1] = \(%expr as lua)
-        end
-        return ret
-    end)()"
 
 externally [..]
     write to file %filename %text, to file %filename write %text
@@ -57,9 +45,9 @@ externally (source lines of %tree) means:
     return (..)
         [..]
             :
-                for % in (line number of %source.start in %file) to (..)
-                    line number of %source.stop in %file
-                ..: add (line % in %file)
+                for % in (%file::line number at %source.start) to (..)
+                    %file::line number at %source.stop
+                ..: add (%file::line %)
         ..::joined with "\n"
 
 externally (spoof file %text) means (%Files.spoof %text)
diff --git a/lib/things.nom b/lib/things.nom
index 731c206..2562815 100644
--- a/lib/things.nom
+++ b/lib/things.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     A library for simple object oriented programming.
     
@@ -13,8 +13,7 @@ test:
             %barks = [: for % in 1 to %its.barks: add "Bark!"]
             return (%barks::joined with " ")
         
-        (%it::gets pissed off) means:
-            %it.barks += 1
+        (%it::gets pissed off) means: %it.barks += 1
     (Dog).genus = "Canus"
     %d = (a Dog with {barks: 2})
     assume "\%d" == "Dog {barks: 2}"
@@ -38,7 +37,7 @@ test:
     a (Corgi) is a thing:
         [%it, %its] = [Corgi, Corgi]
         %it [set up, gets pissed off] like a (Dog)
-        (%it::as text) means "Dogloaf \({: for %k = %v in %it: add %k = %v })"
+        (%it::as text) means "Dogloaf \{: for %k = %v in %it: add %k = %v}"
         (%its::sploot) means "sploooot"
         [%its::bark, %its::woof] all mean:
             %barks = [: for % in 1 to %its.barks: add "Yip!"]
@@ -54,13 +53,14 @@ test:
     
     with {%d: a Dog with {barks: 2}}:
         assume ((%d::bark) == "Bark! Bark!")
-
+    
     a (Vec) is a thing with {x, y}:
         %its = (Vec)
         (%its::+ %other) means (Vec {x: %its.x + %other.x, y: %its.y + %other.y})
     
-    assume ((Vec {x: 1, y:2 }) + (Vec {x: 10, y: 10})) == (Vec {x: 11, y: 12})
-    assume (((Vec {x: 1, y:2 }) + (Vec {x: 10, y: 10})) != (Vec {x: 0, y: 0}))
+    assume ((Vec {x: 1, y: 2}) + (Vec {x: 10, y: 10})) == (Vec {x: 11, y: 12})
+    assume (((Vec {x: 1, y: 2}) + (Vec {x: 10, y: 10})) != (Vec {x: 0, y: 0}))
+
 [..]
     %it can %actions like a %class, %it can %actions like an %class
     %it has %actions like a %class, %it has %actions like an %class
@@ -70,7 +70,8 @@ test:
     %class_expr = (%class as lua expr)
     %lines = []
     for %a in %actions:
-        %lines::add "\(%it as lua expr).\(%a.stub::as lua id) = \%class_expr.\(%a.stub::as lua id)"
+        %lines::add "\
+            ..\(%it as lua expr).\(%a.stub::as lua id) = \%class_expr.\(%a.stub::as lua id)"
     %lua::add %lines joined with "\n"
     return %lua
 
@@ -82,9 +83,7 @@ test:
     "set 1 =": "__newindex", size: "__len", iterate: "__ipairs", "iterate all": "__pairs"
 
 ((% as text like a dict)'s meaning) = ({}'s metatable).__tostring
-
-externally (..)
-    a class named %classname with %members ((initialize %it)'s meaning)
+externally (a class named %classname with %members ((initialize %it)'s meaning)) \
 ..means:
     %class = {__type: %classname}
     %class.__index = %class
@@ -100,18 +99,22 @@ externally (..)
                     rawset %its %key %value
                 ..else:
                     barf "Cannot set \%key, it's not one of the allowed member fields."
+    
     set %class's metatable to {..}
-        __tostring: (%class) -> %class.__type
+        __tostring: %class -> %class.__type
         __call: for (%class with %initial_values):
             if (%initial_values == (nil)): return %class
             set %initial_values's metatable to %class
-            if %initial_values.set_up: %initial_values::set up
+            if %initial_values.set_up:
+                %initial_values::set up
             return %initial_values
+    
     if ((initialize)'s meaning):
         initialize %class
         for %stub = %metamethod in %METAMETHOD_MAP:
             if %class.(%stub::as lua id):
                 %class.%metamethod = %class.(%stub::as lua id)
+    
     return %class
 
 [..]
@@ -123,6 +126,7 @@ externally (..)
         %body_lua = (%class_body as lua)
         %body_lua::remove free vars [%class_id]
         %body_lua::declare locals
+    
     return (..)
         Lua "\
             ..\%class_id = a_class_named_1_with(\(quote %classname.stub), \(%members as lua)\(..)
diff --git a/tools/autoformat.nom b/tools/autoformat.nom
index 8626c91..96b732b 100755
--- a/tools/autoformat.nom
+++ b/tools/autoformat.nom
@@ -1,7 +1,7 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     Auto-format Nomsu code. Usage:
-        nomsu tools/autoformat.nom [-i] file1 file2 directory1 ...
+    nomsu tools/autoformat.nom [-i] file1 file2 directory1 ...
     If the first argument is "-i", modifications will be performed in-place. Otherwise,
     the formatted code will be printed.
     
@@ -16,9 +16,12 @@ if (%args.1 is "-i"):
     %args::remove index 1
 
 for %path in %args:
-    if (%path == "-"): %path = "stdin"
-    for file %filename in %path:
-        unless ((%filename::matches "%.nom$") or (%filename == "stdin")): do next %filename
+    if (%path == "-"):
+        %path = "stdin"
+    
+    for %filename in (files for %path):
+        unless ((%filename::matches "%.nom$") or (%filename == "stdin")):
+            do next %filename
         %contents = (read file %filename)
         %code = (NomsuCode from (Source %filename 1 (size of %contents)) %contents)
         %tree = (%code parsed)
diff --git a/tools/find_action.nom b/tools/find_action.nom
index 1b7c4e1..c6cbe36 100755
--- a/tools/find_action.nom
+++ b/tools/find_action.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     Find an action by its stub. Usage:
     nomsu tools/find_action.nom "foo %" file1 file2 directory1 ...
@@ -13,9 +13,12 @@ use "lib/consolecolor.nom"
 say "Looking for stub: \%stub..."
 for % in 2 to (size of (command line args)):
     for %filename in (files for (command line args).%):
-        if (%filename == "-"): %filename = "stdin"
+        if (%filename == "-"):
+            %filename = "stdin"
+        
         unless ((%filename == "stdin") or (%filename::matches "%.nom$")):
             do next %filename
+        
         %file = (read file %filename)
         %code = (NomsuCode from (%Source %filename 1 (size of %file)) %file)
         try:
@@ -30,7 +33,7 @@ for % in 2 to (size of (command line args)):
         %results = []
         for %t in recursive %tree:
             if ((%t is "Action" syntax tree) and (%t.stub is %stub)):
-                %line_num = (line number of %t.source.start in %file)
+                %line_num = (%file::line number at %t.source.start)
                 %results::add {..}
                     line: %line_num, text: "\(blue "\%filename:\%line_num:")\n\(yellow (source lines of %t))"
             
diff --git a/tools/parse.nom b/tools/parse.nom
index 10d4dde..9e43c88 100755
--- a/tools/parse.nom
+++ b/tools/parse.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     Tool to print out a parse tree of files in an easy-to-read format. Usage:
     nomsu tools/parse.nom file1 file2 directory1 ...        
@@ -37,9 +37,12 @@ externally (print tree %t at indent %indent) means:
 
 for %path in (command line args):
     for %filename in (files for %path):
-        if (%filename == "-"): %filename = "stdin"
+        if (%filename == "-"):
+            %filename = "stdin"
+        
         unless ((%filename == "stdin") or (%filename::matches "%.nom$")):
             do next %filename
+        
         %text = (read file %filename)
         %nomsu = (NomsuCode from (Source %filename 1 (size of %text)) %text)
         %tree = (%nomsu parsed)
diff --git a/tools/repl.nom b/tools/repl.nom
index daa39d0..39d6360 100644
--- a/tools/repl.nom
+++ b/tools/repl.nom
@@ -1,7 +1,7 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     This file defines a Read-Evaluate-Print-Loop (REPL) for Nomsu
-
+    
 use "lib/consolecolor.nom"
 use "lib/os.nom"
 
diff --git a/tools/replace.nom b/tools/replace.nom
index ffd96c1..1ec8ecc 100755
--- a/tools/replace.nom
+++ b/tools/replace.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     Tool to find and replace one tree with another.
     nomsu tools/replace.nom [-i] tree_to_replace replacement file1 file2 directory1 ...
@@ -22,7 +22,7 @@ if ((size of %args) < 3):
 %pattern = (parse (%args::remove index 1))
 %replacement = (parse (%args::remove index 1))
 for %path in %args:
-    for file %filename in %path:
+    for %filename in (files for %path):
         unless (any [%filename::matches "%.nom$", %filename == "-", %filename == "stdin"]):
             do next %filename
         %tree = (parse (read file %filename) from %filename)
diff --git a/tools/test.nom b/tools/test.nom
index 32c9b7a..bdbec54 100755
--- a/tools/test.nom
+++ b/tools/test.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     Tool to run all tests in a file (i.e. the code block inside a call to 'test %'). Usage:
     nomsu tools/test.nom file1 file2 directory1 ...
@@ -17,11 +17,13 @@ if (%args.1 == "-v"):
     :
         for %path in (command line args):
             for %filename in (files for %path):
-                if (%filename == "-"): %filename = "stdin"
-                if ((%filename::matches "%.nom$") or (%filename == "stdin")):
-                    add %filename
+                if (%filename == "-"):
+                    %filename = "stdin"
+                if ((%filename::matches "%.nom$") or (%filename == "stdin")): add %filename
+
 # Make sure all the files get run
-for %filename in %to_run: use %filename
+for %filename in %to_run:
+    use %filename
 %tests = {: for %s = %t in (tests): add (=lua "Source:from_string(\%s)") = %t}
 for %filename in %to_run:
     %file_tests = []
diff --git a/tools/upgrade.nom b/tools/upgrade.nom
index 5f50f73..56d67a5 100755
--- a/tools/upgrade.nom
+++ b/tools/upgrade.nom
@@ -1,4 +1,4 @@
-#!/usr/bin/env nomsu -V4.10.12.7
+#!/usr/bin/env nomsu -V4.11.12.8
 #
     Tool to automatically update code from old versions of Nomsu. Usage:
     nomsu tools/upgrade.nom [-i] file1 file2 directory1 ...
@@ -38,7 +38,7 @@ repeat:
         else: stop
 
 for %path in %args:
-    for file %filename in %path:
+    for %filename in (files for %path):
         unless (%filename::matches "%.nom$"): do next %filename
         %file = (read file %filename)
         %code = (NomsuCode from (%Source %filename 1 (size of %file)) %file)