Ruby » Ruby master

Stop using a regexp that causes a false warning.

• lib/abbrev.rb (Abbrev#abbrev): Stop using a regexp that causes a
  false warning. [Bug #7471]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38028 b2dd03c8-39d4-4d8f-98ff-823fe69b080e