[issue2382] [Py3k] SyntaxError cursor shifted if multibyte character is in line.

[Amaury Forgeot d'Arc]

Amaury Forgeot d'Arc <amauryfa at gmail.com> added the comment:

I think that your patch works only for terminals where one byte of the 
encoded text is displayed as one character on the terminal. This is not 
true for utf-8 terminals, for example.

In the attached patch, I tried to write some unit tests, (I had to adapt 
the traceback module as well), and one test still fails because the 
captured stderr has a utf-8 encoding.
I think that it's better to count unicode characters.

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nosy: +amaury.forgeotdarc
Added file: http://bugs.python.org/file11670/traceback_adjust_cursor.patch

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