Allow parenthesized content exceed configured line width

[MichaReiser]

Summary

This PR changes the formatting for all parenthesized expressions to exceed the configured line width without breaking the enclosing expression. This is only relevant for the optional parentheses (can_omit_optional_parentheses) layout (used by maybe_parenthesize_expression).

The basic idea is that when the content of a parenthesized expression doesn't fit when breaking after the opening (, [, or {, then adding an extra indentation level won't help either.

# Input
assert items == [
    "a very very very very very very very very very very very very very very very long string",
]

# Ruff before

assert (
    items
    == [
        "a very very very very very very very very very very very very very very very long string",
    ]
)

# After this PR (same as black)
assert items == [
    "a very very very very very very very very very very very very very very very long string",
]

You can see in the above example that adding the extra parentheses can never make the string fit, it's simply too long (this becomes less of a problem with the preview string splitting but can still happen with very long identifier names)

This change is implemented by changing the definition of fits_expanded to allow for text overflows when the condition is met (the optional parentheses are omitted).

Closes #7431

Fixes Poetry's assert diffs python-poetry/poetry@master...Secrus:poetry:ruff-formatter#diff-5f9be6a1e39172bd52265fbad21be3b1d184c0856263f30c21ff941e73dfb594L425

Test Plan

Added tests

Main

project	similarity index	total files	changed files
cpython	0.76083	1789	1631
django	0.99983	2760	36
transformers	0.99956	2587	404
twine	1.00000	33	0
typeshed	0.99983	3496	18
warehouse	0.99929	648	16
zulip	0.99969	1437	21

PR

project	similarity index	total files	changed files
cpython	0.76083	1789	1631
django	0.99983	2760	36
transformers	0.99956	2587	404
twine	1.00000	33	0
typeshed	0.99983	3496	18
warehouse	0.99967	648	15
zulip	0.99972	1437	21

[MichaReiser]

Current dependencies on/for this PR:

• main
  • PR Allow parenthesized content exceed configured line width #7490 👈
    • PR POC of assert formatting #6857

This comment was auto-generated by Graphite.

[codspeed-hq]

CodSpeed Performance Report

Merging #7490 will not alter performance

_{Comparing allow-overflow (86bc539) with main (6a4dbd6)}

Summary

✅ 25 untouched benchmarks

[MichaReiser]

This is the main change. Adding a match on args.mode() is mainly to align it with how other group-like IR elements get formatted and avoids extra work in PrintMode::Expanded

[MichaReiser]

We need to move the parentheses out because we want the group outer group to break if the opening or closing parentheses don't fit on the line.

[konstin]

i'd flatten this and expand the lines instead