Fixes

koans.tm

@@ -17,7 +17,7 @@ LESSONS := [
     Lesson((./lessons/lesson-06-arrays.tm), "Arrays"),
     Lesson((./lessons/lesson-07-optionals.tm), "Optionals"),
     Lesson((./lessons/lesson-08-tables.tm), "Tables"),
-    Lesson((./lessons/lesson-09-text), "Text"),
+    Lesson((./lessons/lesson-09-text.tm), "Text"),
     Lesson((./lessons/lesson-10-structs.tm), "Structs"),
     Lesson((./lessons/lesson-11-enums.tm), "Enums"),
     Lesson((./lessons/lesson-12-allocating.tm), "Allocating Memory"),

lesson-templates/lesson-06-arrays.tm

@@ -26,7 +26,7 @@ func main():
     = ???
 
     # Array comprehensions let you transform arrays concisely:
-    squares := [n + 1 for n in nums]
+    squares := [n*n for n in nums]
 
     >> squares
     = [???]

lesson-templates/lesson-07-optionals.tm

@@ -7,7 +7,7 @@ func main():
 
     x := 42?
     >> x
-    = x
+    = 42
 
     # You can assign a `none` value to `x` because it has type `Int?`
     x = none