* string.c (rb_str_upto): RDoc updated. a patch from Nobuhiro

  IMAI <nov at yo.rim.or.jp> in [ruby-dev:39440]. [ruby-dev:39439]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@25249 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 8 insertions, 0 deletions

diff --git a/string.c b/string.c
index cfd830fc04..acb2a91ee8 100644
--- a/string.c
+++ b/string.c
@@ -2863,6 +2863,14 @@ rb_str_succ_bang(VALUE str)
  *
  *     a8 a9 b0 b1 b2 b3 b4 b5 b6
  *     a8 a9 b0 b1 b2 b3 b4 b5 b6
+ *
+ *  If <i>str</i> and <i>other_str</i> contains only ascii numeric characters,
+ *  both are recognized as decimal numbers. In addition, the width of
+ *  string (e.g. leading zeros) is handled appropriately.
+ *
+ *     "9".upto("11").to_a   => ["9", "10", "11"]
+ *     "25".upto("5").to_a   => []
+ *     "07".upto("11").to_a  => ["07", "08", "09", "10", "11"]
  */
 
 static VALUE