Fix text layout for align="center", wrap="clip" when maxcol == line_width - 1

[AnonymouX47]

Checklist

• I've ensured that similar functionality has not already been implemented
• I've ensured that similar functionality has not earlier been proposed and declined
• I've branched off the master or python-dual-support branch
• I've merged fresh upstream into my branch recently
• I've ran tox successfully in local environment
• I've included docstrings and/or documentation and/or examples for my code (if this is a new feature)

Description:

Fixes: #542

I also realized (and tested) that the bug could be fixed by guarding the append at:

urwid/urwid/canvas.py

Line 1333 in 350ee5c

linea.append((None, s.sc))

with if s.sc: but that would only apply to the Text widget.

[penguinolog]

Please add test to the fixed issue. It should help in case of regression.

[AnonymouX47]

Done. Is that sufficient?

[AnonymouX47]

If I may ask... Why do so many workflow run attempts fail?

Just this one PR has spammed my mailbox so dang much... and it has just been two runs so far.

[penguinolog]

We have race conditions at test_vterm and event loop test. Need to fix it. Op zo 23 apr. 2023 22:50 schreef Toluwaleke Ogundipe < ***@***.***>:

…

If I may ask... Why do so many workflow run attempts always fail? Just this one PR has spammed my mailbox so dang much... and it has just been two runs so far. — Reply to this email directly, view it on GitHub <#543 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AD2KMM77SPN4UGZAHQHXEDDXCWIXZANCNFSM6AAAAAAXIGZBHI> . You are receiving this because you commented.Message ID: ***@***.***>

[AnonymouX47]

Oh! I see.