In a project set to use Python 3.3 x64, if I open C:\Python33_x64\Lib\sre_parse.py in the editor I a couple of sections of code marked by red squigglies: Subpattern's dump method, Tokenizer class definition.
In Subpattern.dump, if I remove
, end=' '
on line 101 then the squigglies go away. If I try to replicate that same line of code in a separate file, there are no errors.