[3889] Fix long lines with power operator(s) getting splitted before line length

[henriholopainen]

Description

Hugging power operators had a bug, where operators that end up hugging were still counted as not hugging when deciding to split the line. The bug is described here. The whole issue is a bit circular as we need to know the line length before we start to apply transformations. Calculating the hugging of power operators at the beginning of transform_line seems to do the trick. Ideally the hug_power_op transform would be done only once, but switching the order of transforms broke a lot of other places, so I don't know if there's any other good options here.

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• Add new / update outdated documentation?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 (ba2cc11) to main (6f84f65). The full diff is available in the logs under the "Generate HTML diff report" step.

╭─────────────────────── Summary ────────────────────────╮
│ 3 projects & 10 files changed / 56 changes [+14/-42]   │
│                                                        │
│ ... out of 2 497 808 lines, 11 746 files & 23 projects │
╰────────────────────────────────────────────────────────╯

Differences found.

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

[henriholopainen]

diff-shades results comparing this PR (43fcdee) to main (935f303). The full diff is available in the logs under the "Generate HTML diff report" step.

╭─────────────────────── Summary ────────────────────────╮
│ 3 projects & 10 files changed / 56 changes [+14/-42]   │
│                                                        │
│ ... out of 2 496 979 lines, 11 745 files & 23 projects │
╰────────────────────────────────────────────────────────╯

Differences found.

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

These all seem to be cases of erroneous line splitting getting fixed.

[JelleZijlstra]

Thanks. This looks correct, but we'll have to make the change in the preview style only for now.

[henriholopainen]

Thanks. This looks correct, but we'll have to make the change in the preview style only for now.

Ok, will do. Does this mean that the tests should also be reverted, as they will fail after the fix is behind --preview?

[JelleZijlstra]

You can add # flags: --preview to the top of the test so they get run in preview mode.