[issue22578] Add additional attributes to re.error

[Matthew Barnett]

Matthew Barnett added the comment:

I prefer to include the line and column numbers if it's a multi-line pattern, not just if the line number is > 1.

BTW, it's shorter if you do this:

    self.colno = pos - pattern.rfind(newline, 0, pos)

If there's no newline, .rfind will return -1.

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<http://bugs.python.org/issue22578>
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