scm: mercurial: use revision text mercurial style "2:400bb8672109" (#3724).

Contributed by Yuya Nishihara.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4697 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/repository/mercurial.rb

@@ -34,8 +34,7 @@ class Repository::Mercurial < Repository
 
   # Returns the readable identifier for the given mercurial changeset
   def self.format_changeset_identifier(changeset)
-    # "#{changeset.revision}:#{changeset.scmid}"
-    changeset.revision
+    "#{changeset.revision}:#{changeset.scmid}"
   end
 
   # Returns the identifier for the given Mercurial changeset