merge revision(s) 50509: [Backport #11132]

* string.c: added documentation for character sequence \' with String#sub
	  [Bug #11132][ruby-core:69121][fix GH-900][ci skip] Patch by @shishir127


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@50628 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sun May 24 03:37:14 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
+
+	* string.c: added documentation for character sequence \' with String#sub
+	  [Bug #11132][ruby-core:69121][fix GH-900][ci skip] Patch by @shishir127
+
 Sun May 24 03:32:53 2015  SHIBATA Hiroshi  <hsbt@ruby-lang.org>
 
 	* rational.c: Added documentation for rational literal.

string.c

@@ -4226,6 +4226,9 @@ rb_str_sub_bang(int argc, VALUE *argv, VALUE str)
  *  double-quoted string, both back-references must be preceded by an
  *  additional backslash. However, within +replacement+ the special match
  *  variables, such as <code>&$</code>, will not refer to the current match.
+ *  If +replacement+ is a String that looks like a pattern's capture group but
+ *  is actaully not a pattern capture group e.g. <code>"\\'"</code>, then it
+ *  will have to be preceded by two backslashes like so <code>"\\\\'"</code>.
  *
  *  If the second argument is a Hash, and the matched text is one of its keys,
  *  the corresponding value is the replacement string.

version.h

@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.2.3"
 #define RUBY_RELEASE_DATE "2015-05-24"
-#define RUBY_PATCHLEVEL 124
+#define RUBY_PATCHLEVEL 125
 
 #define RUBY_RELEASE_YEAR 2015
 #define RUBY_RELEASE_MONTH 5