* string.c (sym_find): Add Symbol.find(str), which returns whether given
  string is defined as symbol or not. [Feature #7854]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45175 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-02-26

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45176 b2dd03c8-39d4-4d8f-98ff-823fe69b080e