[Merged by Bors] - doc: fix the docstring of IsTopologicalTorsor

[gasparattila]

The docstring incorrectly refers to +ᵥ and -ᵥ instead of their multiplicative versions.

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[gasparattila]

easy

[github-actions]

PR summary f3035c0fdf

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Import changes for all files

Files	Import difference

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Declarations diff (regex)

No declarations were harmed in the making of this PR! 🐙

You can run this locally as follows

## from your `mathlib4` directory:
git clone https://github.com/leanprover-community/mathlib-ci.git ../mathlib-ci

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

## more verbose report:
../mathlib-ci/scripts/pr_summary/declarations_diff.sh long <optional_commit>

The doc-module for scripts/pr_summary/declarations_diff.sh in the mathlib-ci repository contains some details about this script.

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No changes to strong technical debt.

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Current commit f3035c0fdf
Reference commit 11d11a11a6

This script lives in the mathlib-ci repository. To run it locally, from your mathlib4 directory:

git clone https://github.com/leanprover-community/mathlib-ci.git ../mathlib-ci
../mathlib-ci/scripts/reporting/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).

[j-loreaux]

@gasparattila okay, but please also include the docstring for the additive versions in the to_additive bit, like so:

Suggested change

	/-- A topological torsor over a topological group is a torsor where `•` and `/ₛ` are continuous. -/
	@[to_additive]
	/-- A topological torsor over a topological group is a torsor where `•` and `/ₛ` are continuous. -/
	@[to_additive /-- A topological additive torsor over a topological additive group is a torsor
	where `+ᵥ` and `-ᵥ` are continuous. -/]

I'll just add this for now and merge it, but I wanted to point out that we should have both.

[plp127]

@j-loreaux IsTopologicalAddTorsor is defined above, it already has a docstring

[gasparattila]

@j-loreaux I've undone your change, since it would unnecessarily overwrite the existing docstring. I've also made #41883 to warn in this kind of situation.

[mathlib-auto-merge]

As this PR is labelled auto-merge-after-CI, we are now sending it to bors:

bors merge

[mathlib-bors]

Pull request successfully merged into master.

Build succeeded:

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