| 123456789101112131415161718 | Now
===
- (Python 3.0) non-ASCII identifiers. Also str.format should be updated;
- (Python 3.0) support for b"..." syntax and remove u"..." syntax. Also all
  escapes need to be updated;
Later
=====
- Highligh errors where symbols follow by numbers like this: 0o123LaB
- Need more accurate way to handle indentation errors. For example
  mixing spaces and tabs may be used for pretty formatting;
- Need more checks for errors like: absent brackets, absent quotes,
  back slash at the end of strings;
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