Ideally, the `perfdocs` linter suggestion to `--fix` issues would take
into account the `paths` that were provided, rather than printing the
sure-fire "lint and fix all" solution.
Actually, on further consideration, theoretically such a recommendation
should appear at the `./mach lint` level, and not be linter-specific. Oh
well, that's a future improvement :)
-----
This patch updates the `perfdocs` documentation and suggestions to
successfully operate in the same manner that they did before
bug 1753701.
Differential Revision: https://phabricator.services.mozilla.com/D139159
ac893c8e81