Fix typo of URI#escape [Bug #13147]

patched by Steve Hill <sghill.dev@gmail.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57411 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/uri/common.rb

@@ -82,7 +82,7 @@ module URI
     # Escapes the string, replacing all unsafe characters with codes.
     #
     # This method is obsolete and should not be used. Instead, use
-    # CGI.escape, URI.www_form_encode or URI.www_form_encode_component
+    # CGI.escape, URI.encode_www_form or URI.encode_www_form_component
     # depending on your specific use case.
     #
     # == Usage