[issue5129] indentation in IDLE 2.6 different from IDLE 2.5, 2.4 or vim

[sy12]

sy12 <sy12 at club-internet.fr> added the comment:

The problem appeared in the initial display, with a file similar to bug.py.

Here is how to reproduce it:
1. open the bug.py file with IDLE 2.5 (or with Firefox from the
bugs.python.org website): the display shows the file the way the
compiler will (probably) see it;
2. open the bug.py file with IDLE 2.6: the line 7 (just after "else:")
is displayed differently.

Summary: IDLE 2.6 doesn't display the indentation that the compiler will
see.

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About the secondary problem with Untabify (discovered when trying to
solve the display problem without having to reinstall Python 2.5):

Actually, Untabify is more a solution than a problem, except maybe that
the only safe value is 8 spaces for a tabulation. Using a different
value on legacy code (old code without tests) might add subtle bugs.

According to the Python Language Reference:
"First, tabs are replaced (from left to right) by one to eight spaces
such that the total number of characters up to and including the
replacement is a multiple of eight (this is intended to be the same rule
as used by Unix)."
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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue5129>
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