[BUG] `cell_len` doesn't account for control characters

[TomJGooding]

The overhaul of cell_len in Rich v14.3.0 doesn't seem to account for control characters.

from rich.cells import cell_len

for i in range(32):
    char = chr(i)
    char_len = cell_len(char)
    print(f"{repr(char):6}  {char_len}")

Previously it looks like there was special handling for these codepoints, but now it reports a cell width of 1.

rich/rich/_cell_widths.py

Lines 3 to 6 in 53757bc

	CELL_WIDTHS = [
	(0, 0, 0),
	(1, 31, -1),
	(127, 159, -1),

I'm surprised this change didn't break any tests, but I've not investigated Rich itself. I found this bug while investigating a problem in Textual:

• TextArea wrapping tabs strangely with latest Rich textual#6351

[github-actions]

Thank you for your issue. Give us a little time to review it.

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[github-actions]

I hope I helped!

Consider sponsoring my work on Rich. I give tech support for free, in addition to maintaining Rich and Textual.

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Will McGugan