Added a comma to line 223 to fix a syntax error preventing launch

Changed line 223 from:
```
              'Library/Developer/Xcode/UserData/SearchScopes.xcsclist']
```

to:
```
              'Library/Developer/Xcode/UserData/SearchScopes.xcsclist'],
```

AKA, I added a comma to the end.  :)  Otherwise, this happens at launch:
```	 
	   File "./mackup.py", line 225
	     'XEmacs': ['.xemacs'],
	            ^
	 SyntaxError: invalid syntax
```