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Created on 2017-09-14 19:59 by bup, last changed 2022-04-11 14:58 by admin. This issue is now closed.
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| msg302204 - (view) | Author: Dan Snider (bup) * | Date: 2017-09-14 19:59 | |
This function is supposed to be purely cosmetic. It just cleans up the junk whitespace commonly left behind when coding. But it could cause a problem when someone expects some string they defined to stay the same value, and then use that function and all of a sudden they have a crazy bug that you wouldn't even know how to find. |
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| msg302274 - (view) | Author: Terry J. Reedy (terry.reedy) *  |
Date: 2017-09-15 16:40 | |
The current behavior of IDLE's feature is standard, not a bug. The cpython respository does not currently accept .py, .c, or .rst files with any trailing whitespace. <pythondir>/tools/scripts/patchcheck.py strips trailing whitespace from all lines. Notepad++, a widely used multi-language Windows programmer's editor, does the same.
I am aware of the potential surprise. If one wants multiline strings with embedded trailing whitespace, one should avoid trailing whitespace strippers or use Python's string concatenation feature.
>>> s = ('space \n' 'tab\t\n' 'line3\n')
>>> s
'space \ntab\t\nline3\n'
I am revising the doc to make the rstring behavior clearer.
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:52 | admin | set | github: 75658 |
| 2017-09-15 21:58:02 | terry.reedy | set | status: open -> closed resolution: fixed stage: patch review -> resolved |
| 2017-09-15 16:40:33 | terry.reedy | set | title: IDLE 'strip trailing whitespace' changes the value of multiline strings -> IDLE 'strip trailing whitespace' changes multiline strings stage: patch review messages: + msg302274 versions: + Python 3.7 |
| 2017-09-14 19:59:30 | bup | create | |