Wrap concatenated strings used as function args in parens.

[yilei]

Description

This implements #3292.

I have only heard one 👍 from @felix-hilden. But I think it's also easier to decide after seeing the formatting changes introduced by this PR, thus I'm sending it now so we can visualize the diffs.

Checklist - did you ...

• Add an entry in CHANGES.md if necessary?
• Add / update tests if necessary?
• Add new / update outdated documentation?

[github-actions]

diff-shades results comparing this PR (5f4e810) to main (09d4acd). The full diff is available in the logs under the "Generate HTML diff report" step.

╭───────────────────────────── Summary ──────────────────────────────╮
│ 17 projects & 529 files changed / 39 015 changes [+23 421/-15 594] │
│                                                                    │
│ ... out of 2 329 053 lines, 10 713 files & 23 projects             │
╰────────────────────────────────────────────────────────────────────╯

Differences found.

What is this? | Workflow run | diff-shades documentation

[JelleZijlstra]

Looking at the diff-shades output I'm still a bit nervous whether this is a net positive, since it does often feel like it's adding unnecessary lines. But I guess that's what we have a preview style for.

[yilei]

Updated, please take another look. Thanks Jelle!