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

lib/redmine/scm/adapters/subversion_adapter.rb

@@ -142,7 +142,7 @@ module Redmine
             end
           end
           return nil if $? && $?.exitstatus != 0
-          DiffTableList.new diff, type    
+          diff
         end
         
         def cat(path, identifier=nil)