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/cvs.rb

@@ -53,7 +53,7 @@ class Repository::Cvs < Repository
     entries
   end
   
-  def diff(path, rev, rev_to, type)
+  def diff(path, rev, rev_to)
     #convert rev to revision. CVS can't handle changesets here
     diff=[]
     changeset_from=changesets.find_by_revision(rev)
@@ -76,7 +76,7 @@ class Repository::Cvs < Repository
         unless revision_to
           revision_to=scm.get_previous_revision(revision_from)
         end
-        diff=diff+scm.diff(change_from.path, revision_from, revision_to, type)
+        diff=diff+scm.diff(change_from.path, revision_from, revision_to)
       end
     end
     return diff