anchor.diff:  
   write_refactored_files_for_preview(Files, TabWidth, LogMsg) ->
       write_refactored_files_for_preview(Files, TabWidth, LogMsg, []).
  -write_refactored_files_for_preview(Files, TabWidth, LogMsg, SearchPaths) ->
  +write_refactored_files_for_preview(Files, TabWidth, LogMsg, _SearchPaths) ->
       F = fun (FileAST) ->
   		case FileAST of
   		    {{FileName,NewFileName}, AST} ->
  
positive.code:                         {Content, Changes} = wrangler_prettypr:print_ast_and_get_changes(FileFormat, AST, TabWidth),
  			case file:write_file(SwpFileName, list_to_binary(Content)) of
  			    ok ->
                                  wrangler_ast_server:update_ast({FileName, true, SearchPaths, TabWidth, FileFormat}, SwpFileName),
                                  {{{filename:join([FileName]),
                                     filename:join([NewFileName]), false},
                                    filename:join([SwpFileName])}, Changes};
  
negative.code: 			end;
  		    {{FileName, NewFileName, IsNew}, AST} ->
  			FileFormat = wrangler_misc:file_format(FileName),
  			SwpFileName = filename:rootname(NewFileName, ".erl") ++ ".erl.swp",
                          {Content, Changes} = wrangler_prettypr:print_ast_and_get_changes(FileFormat, AST, TabWidth),
  			case file:write_file(SwpFileName, list_to_binary(Content)) of
  			    ok ->
  