merge revision(s) 56421,56422: [Backport #11736]

	* object.c: Improve documentation for Integer conversion.
	  [ruby-core:71661][Bug #11736][ci skip]

	* object.c: Improve documentation for Float conversion.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@56501 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 3 deletions

diff --git a/object.c b/object.c
index fe7b6f9be8..1addc92717 100644
--- a/object.c
+++ b/object.c
@@ -2953,11 +2953,14 @@ rb_Float(VALUE val)
  *     Float(arg)    -> float
  *
  *  Returns <i>arg</i> converted to a float. Numeric types are converted
- *  directly, the rest are converted using <i>arg</i>.to_f.
+ *  directly, and with exception to string and nil the rest are converted using <i>arg</i>.to_f.
+ *  Converting a <code>string</code> with invalid characters will result in a <code>ArgumentError</code>.
  *  Converting <code>nil</code> generates a <code>TypeError</code>.
  *
- *     Float(1)           #=> 1.0
- *     Float("123.456")   #=> 123.456
+ *     Float(1)                 #=> 1.0
+ *     Float("123.456")         #=> 123.456
+ *     Float("123.0_badstring") #=> ArgumentError: invalid value for Float(): "123.0_badstring"
+ *     Float(nil)               #=> TypeError: can't convert nil into Float
  */
 
 static VALUE