Move unified diff parser out of the scm abstract adapter so it can be reused for viewing attached diffs (#1403).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1513 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/repository.rb

@@ -55,8 +55,8 @@ class Repository < ActiveRecord::Base
     scm.entries(path, identifier)
   end
   
-  def diff(path, rev, rev_to, type)
-    scm.diff(path, rev, rev_to, type)
+  def diff(path, rev, rev_to)
+    scm.diff(path, rev, rev_to)
   end
   
   # Default behaviour: we search in cached changesets