[Merged by Bors] - style(misc): fix whitespace

[grunweg]

Extracted from #30658. Found by extending the commandStart linter to proof bodies.

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[github-actions]

PR summary d9d1cc1012

Import changes for modified files

No significant changes to the import graph

Import changes for all files

Files	Import difference

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Declarations diff

+ instance (priority := 100) small_succ (α : Type v) : Small.{v + 1} α
- instance (priority := 100) small_succ (α : Type v) : Small.{v+1} α

You can run this locally as follows

## summary with just the declaration names:
./scripts/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for script/declarations_diff.sh contains some details about this script.

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No changes to technical debt.

You can run this locally as

./scripts/technical-debt-metrics.sh pr_summary

• The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
• The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

[JovanGerb]

Why are we changing the comment here (and below)? The comment above is also not capitalized.

[grunweg]

I can only speculate about Damiano's intentions. I personally think this is better style, but I'm happy to revert this change if you prefer (or to also change the comment a few lines up).

[adomani]

I was simply following Michael's convention to properly capitalise and add punctuation for fully-formed sentences, but only on places that I noticed while looking at the code. I don't have any special attachment to the non-linter-enforced changes in the PR.

[JovanGerb]

I feel like that is convention is more relevant for doc-strings. For inline comments, I think there can be more freedom.

[grunweg]

I have tweaked the comment above, and have a slight preference for this way. If you feel strongly enough, I'll revert that part.

[grunweg]

Thanks for the careful look!

[grunweg]

I can only speculate about Damiano's intentions. I personally think this is better style, but I'm happy to revert this change if you prefer (or to also change the comment a few lines up).

[grunweg]

Barring further objections, I'll merge this in 24 hours.

[grunweg]

Let's merge this:
bors merge

[grunweg]

Thanks for the careful reviews, again!

[mathlib-bors]

This PR was included in a batch that was canceled, it will be automatically retried

[mathlib-bors]

Pull request successfully merged into master.

Build succeeded:

• Build
• Post-Build Step
• Lint style