[issue6220] typo: opne in "doanddont"

[Ezio Melotti]

Ezio Melotti <ezio.melotti at gmail.com> added the comment:

If we use the bare "except:" the message "could not open file!" is shown
and we would waste time trying to figure out why it can't be opened.

Instead, if we use "except IOError:", the first time we run the program
the error "NameError: name 'opne' is not defined" is raised, telling us
what's wrong. Once we know it, we can change 'opne' to 'open' and solve
the problem.

Indeed it could be clearer.

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keywords:  -patch

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