Fix doc with default value with GH-523
basename
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53668 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Fix doc with default value with GH-523
basenameis optional and defaulted to an empty string since[GH-523]. [Fix GH-1225]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53668 b2dd03c8-39d4-4d8f-98ff-823fe69b080e