nobu	2016-12-21 10:29:58 +0900 (Wed, 21 Dec 2016)

  New Revision: 57131

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=57131

  Log:
    numeric.c: rdoc of half option [ci skip]
    
    * numeric.c (flo_round): [DOC] mention half option.  [Bug #12548]

  Modified files:
    trunk/numeric.c
Index: numeric.c
===================================================================
--- numeric.c	(revision 57130)
+++ numeric.c	(revision 57131)
@@ -2223,6 +2223,12 @@ rb_int_truncate(VALUE num, int ndigits) https://github.com/ruby/ruby/blob/trunk/numeric.c#L2223
  *     34567.89.round(2)  #=> 34567.89
  *     34567.89.round(3)  #=> 34567.89
  *
+ *  If <code>half:</code> optional keyword is given, just-half number
+ *  will be rounded according to that value.  If it is
+ *  <code>:up</code> or +nil+, the result will be rounded up, or it is
+ *  <code>:even</code>, the result will be rounded to nearest even
+ *  number, or it is <code>:down</code>, the result will be rounded
+ *  down.
  */
 
 static VALUE

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