Use string instead of regexp

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61225 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/uri/generic.rb

@@ -979,7 +979,7 @@ module URI
     # returns an Array of the path split on '/'
     #
     def split_path(path)
-      path.split(%r{/}, -1)
+      path.split("/", -1)
     end
     private :split_path