scm: mercurial: add "hgtarget" method (#4455).

Abstract adapter shell quotes paths.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4840 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/scm/adapters/mercurial_adapter.rb

@@ -251,6 +251,12 @@ module Redmine
           rev
         end
         private :hgrev
+
+        def hgtarget(path)
+          path ||= ''
+          root_url + '/' + without_leading_slash(path)
+        end
+        private :hgtarget
       end
     end
   end