Update stdlib to use `print` instead of `printf` in all cases. This

means bringing in fpconv to do float-to-string conversion and a few
updates to integer and number methods for string formatting.

5 files changed, 96 insertions, 205 deletions

diff --git a/api/api.md b/api/api.md
index 56105498..527708ad 100644
--- a/api/api.md
+++ b/api/api.md
@@ -402,28 +402,6 @@ n | `Int` | The integer to compute the factorial of.  | -
 = 3628800
 
 ```
-## Int.format
-
-```tomo
-Int.format : func(i: Int, digits: Int = 0 -> Text)
-```
-
-Formats an integer as a string with a specified number of digits.
-
-Argument | Type | Description | Default
----------|------|-------------|---------
-i | `Int` | The integer to be formatted.  | -
-digits | `Int` | The minimum number of digits to which the integer should be padded.  | `0`
-
-**Return:** A string representation of the integer, padded to the specified number of digits.
-
-
-**Example:**
-```tomo
->> (42).format(digits=5)
-= "00042"
-
-```
 ## Int.hex
 
 ```tomo
@@ -1890,28 +1868,6 @@ x | `Num` | The number to be rounded down.  | -
 = 3
 
 ```
-## Num.format
-
-```tomo
-Num.format : func(n: Num, precision: Int = 0 -> Text)
-```
-
-Formats a number as a text with a specified precision.
-
-Argument | Type | Description | Default
----------|------|-------------|---------
-n | `Num` | The number to be formatted.  | -
-precision | `Int` | The number of decimal places. Default is `0`.  | `0`
-
-**Return:** A text representation of the number with the specified precision.
-
-
-**Example:**
-```tomo
->> (3.14159).format(precision=2)
-= "3.14"
-
-```
 ## Num.hypot
 
 ```tomo
@@ -2257,7 +2213,7 @@ text | `Text` | The text containing the number.  | -
 ## Num.percent
 
 ```tomo
-Num.percent : func(n: Num, precision: Int = 0 -> Text)
+Num.percent : func(n: Num, precision: Num = 0.01 -> Text)
 ```
 
 Convert a number into a percentage text with a percent sign.
@@ -2265,7 +2221,7 @@ Convert a number into a percentage text with a percent sign.
 Argument | Type | Description | Default
 ---------|------|-------------|---------
 n | `Num` | The number to be converted to a percent.  | -
-precision | `Int` | The number of decimal places. Default is `0`.  | `0`
+precision | `Num` | Round the percentage to this precision level.  | `0.01`
 
 **Return:** A text representation of the number as a percentage with a percent sign.
 
@@ -2276,6 +2232,10 @@ precision | `Int` | The number of decimal places. Default is `0`.  | `0`
 = "50%"
 >> (1./3.).percent(2)
 = "33.33%"
+>> (1./3.).percent(2, precision=0.0001)
+= "33.3333%"
+>> (1./3.).percent(2, precision=10.)
+= "30%"
 
 ```
 ## Num.rint
@@ -2324,28 +2284,6 @@ x | `Num` | The number to be rounded.  | -
 = 3
 
 ```
-## Num.scientific
-
-```tomo
-Num.scientific : func(n: Num, precision: Int = 0 -> Text)
-```
-
-Formats a number in scientific notation with a specified precision.
-
-Argument | Type | Description | Default
----------|------|-------------|---------
-n | `Num` | The number to be formatted.  | -
-precision | `Int` | The number of decimal places. Default is `0`.  | `0`
-
-**Return:** A text representation of the number in scientific notation with the specified precision.
-
-
-**Example:**
-```tomo
->> (12345.6789).scientific(precision=2)
-= "1.23e+04"
-
-```
 ## Num.significand
 
 ```tomo
@@ -2516,6 +2454,32 @@ x | `Num` | The number to be truncated.  | -
 = -3
 
 ```
+## Num.with_precision
+
+```tomo
+Num.with_precision : func(n: Num, precision: Num -> Num)
+```
+
+Round a number to the given precision level (specified as `10`, `.1`, `.001` etc).
+
+Argument | Type | Description | Default
+---------|------|-------------|---------
+n | `Num` | The number to be rounded to a given precision.  | -
+precision | `Num` | The precision to which the number should be rounded.  | -
+
+**Return:** The number, rounded to the given precision level.
+
+
+**Example:**
+```tomo
+>> (0.1234567).with_precision(0.01)
+= 0.12
+>> (123456.).with_precision(100)
+= 123500
+>> (1234567.).with_precision(5)
+= 1234565
+
+```
 ## Num.y0
 
 ```tomo
diff --git a/api/integers.md b/api/integers.md
index d79812df..0865e93f 100644
--- a/api/integers.md
+++ b/api/integers.md
@@ -90,28 +90,6 @@ n | `Int` | The integer to compute the factorial of.  | -
 = 3628800
 
 ```
-## Int.format
-
-```tomo
-Int.format : func(i: Int, digits: Int = 0 -> Text)
-```
-
-Formats an integer as a string with a specified number of digits.
-
-Argument | Type | Description | Default
----------|------|-------------|---------
-i | `Int` | The integer to be formatted.  | -
-digits | `Int` | The minimum number of digits to which the integer should be padded.  | `0`
-
-**Return:** A string representation of the integer, padded to the specified number of digits.
-
-
-**Example:**
-```tomo
->> (42).format(digits=5)
-= "00042"
-
-```
 ## Int.hex
 
 ```tomo
diff --git a/api/integers.yaml b/api/integers.yaml
index 4e5ec46c..f927c75f 100644
--- a/api/integers.yaml
+++ b/api/integers.yaml
@@ -82,28 +82,6 @@ Int.factorial:
     >> (10).factorial()
     = 3628800
     
-Int.format:
-  short: text formatting
-  description: >
-    Formats an integer as a string with a specified number of digits.
-  return:
-    type: 'Text'
-    description: >
-      A string representation of the integer, padded to the specified number of digits.
-  args:
-    i:
-      type: 'Int'
-      description: >
-        The integer to be formatted.
-    digits:
-      type: 'Int'
-      default: '0'
-      description: >
-        The minimum number of digits to which the integer should be padded.
-  example: |
-    >> (42).format(digits=5)
-    = "00042"
-    
 Int.hex:
   short: convert to hexidecimal
   description: >
diff --git a/api/nums.md b/api/nums.md
index e42329f9..471a7739 100644
--- a/api/nums.md
+++ b/api/nums.md
@@ -563,28 +563,6 @@ x | `Num` | The number to be rounded down.  | -
 = 3
 
 ```
-## Num.format
-
-```tomo
-Num.format : func(n: Num, precision: Int = 0 -> Text)
-```
-
-Formats a number as a text with a specified precision.
-
-Argument | Type | Description | Default
----------|------|-------------|---------
-n | `Num` | The number to be formatted.  | -
-precision | `Int` | The number of decimal places. Default is `0`.  | `0`
-
-**Return:** A text representation of the number with the specified precision.
-
-
-**Example:**
-```tomo
->> (3.14159).format(precision=2)
-= "3.14"
-
-```
 ## Num.hypot
 
 ```tomo
@@ -930,7 +908,7 @@ text | `Text` | The text containing the number.  | -
 ## Num.percent
 
 ```tomo
-Num.percent : func(n: Num, precision: Int = 0 -> Text)
+Num.percent : func(n: Num, precision: Num = 0.01 -> Text)
 ```
 
 Convert a number into a percentage text with a percent sign.
@@ -938,7 +916,7 @@ Convert a number into a percentage text with a percent sign.
 Argument | Type | Description | Default
 ---------|------|-------------|---------
 n | `Num` | The number to be converted to a percent.  | -
-precision | `Int` | The number of decimal places. Default is `0`.  | `0`
+precision | `Num` | Round the percentage to this precision level.  | `0.01`
 
 **Return:** A text representation of the number as a percentage with a percent sign.
 
@@ -949,6 +927,10 @@ precision | `Int` | The number of decimal places. Default is `0`.  | `0`
 = "50%"
 >> (1./3.).percent(2)
 = "33.33%"
+>> (1./3.).percent(2, precision=0.0001)
+= "33.3333%"
+>> (1./3.).percent(2, precision=10.)
+= "30%"
 
 ```
 ## Num.rint
@@ -997,28 +979,6 @@ x | `Num` | The number to be rounded.  | -
 = 3
 
 ```
-## Num.scientific
-
-```tomo
-Num.scientific : func(n: Num, precision: Int = 0 -> Text)
-```
-
-Formats a number in scientific notation with a specified precision.
-
-Argument | Type | Description | Default
----------|------|-------------|---------
-n | `Num` | The number to be formatted.  | -
-precision | `Int` | The number of decimal places. Default is `0`.  | `0`
-
-**Return:** A text representation of the number in scientific notation with the specified precision.
-
-
-**Example:**
-```tomo
->> (12345.6789).scientific(precision=2)
-= "1.23e+04"
-
-```
 ## Num.significand
 
 ```tomo
@@ -1189,6 +1149,32 @@ x | `Num` | The number to be truncated.  | -
 = -3
 
 ```
+## Num.with_precision
+
+```tomo
+Num.with_precision : func(n: Num, precision: Num -> Num)
+```
+
+Round a number to the given precision level (specified as `10`, `.1`, `.001` etc).
+
+Argument | Type | Description | Default
+---------|------|-------------|---------
+n | `Num` | The number to be rounded to a given precision.  | -
+precision | `Num` | The precision to which the number should be rounded.  | -
+
+**Return:** The number, rounded to the given precision level.
+
+
+**Example:**
+```tomo
+>> (0.1234567).with_precision(0.01)
+= 0.12
+>> (123456.).with_precision(100)
+= 123500
+>> (1234567.).with_precision(5)
+= 1234565
+
+```
 ## Num.y0
 
 ```tomo
diff --git a/api/nums.yaml b/api/nums.yaml
index 37b2c7c5..e666a0d6 100644
--- a/api/nums.yaml
+++ b/api/nums.yaml
@@ -378,28 +378,6 @@ Num.floor:
     >> (3.7).floor()
     = 3
     
-Num.format:
-  short: convert a number to text
-  description: >
-    Formats a number as a text with a specified precision.
-  return:
-    type: 'Text'
-    description: >
-      A text representation of the number with the specified precision.
-  args:
-    n:
-      type: 'Num'
-      description: >
-        The number to be formatted.
-    precision:
-      type: 'Int'
-      default: '0'
-      description: >
-        The number of decimal places. Default is `0`.
-  example: |
-    >> (3.14159).format(precision=2)
-    = "3.14"
-    
 Num.hypot:
   short: Euclidean distance function
   description: >
@@ -728,15 +706,44 @@ Num.percent:
       description: >
         The number to be converted to a percent.
     precision:
-      type: 'Int'
-      default: '0'
+      type: 'Num'
+      default: '0.01'
       description: >
-        The number of decimal places. Default is `0`.
+        Round the percentage to this precision level.
   example: |
     >> (0.5).percent()
     = "50%"
     >> (1./3.).percent(2)
     = "33.33%"
+    >> (1./3.).percent(2, precision=0.0001)
+    = "33.3333%"
+    >> (1./3.).percent(2, precision=10.)
+    = "30%"
+
+Num.with_precision:
+  short: round to a given precision
+  description: >
+    Round a number to the given precision level (specified as `10`, `.1`, `.001` etc).
+  return:
+    type: 'Num'
+    description: >
+      The number, rounded to the given precision level.
+  args:
+    n:
+      type: 'Num'
+      description: >
+        The number to be rounded to a given precision.
+    precision:
+      type: 'Num'
+      description: >
+        The precision to which the number should be rounded.
+  example: |
+    >> (0.1234567).with_precision(0.01)
+    = 0.12
+    >> (123456.).with_precision(100)
+    = 123500
+    >> (1234567.).with_precision(5)
+    = 1234565
     
 Num.rint:
   short: round to nearest integer
@@ -776,28 +783,6 @@ Num.round:
     >> (2.7).round()
     = 3
     
-Num.scientific:
-  short: format in scientific notation
-  description: >
-    Formats a number in scientific notation with a specified precision.
-  return:
-    type: 'Text'
-    description: >
-      A text representation of the number in scientific notation with the specified precision.
-  args:
-    n:
-      type: 'Num'
-      description: >
-        The number to be formatted.
-    precision:
-      type: 'Int'
-      default: '0'
-      description: >
-        The number of decimal places. Default is `0`.
-  example: |
-    >> (12345.6789).scientific(precision=2)
-    = "1.23e+04"
-    
 Num.significand:
   short: get mantissa
   description: >