Generate # pyrefly: ignore[code] without a space before the bracket

[Aniketsy]

Summary

pyrefly suppress were adding comments like # pyrefly: ignore [code] (with a space), but the docs use # pyrefly: ignore[code] (no space). This PR makes both generate the no-space style, as discussed in the issue.

comments with a space still work, nothing changes for existing code.

Fixes #4991

Test Plan

• Updated the existing tests and added a few new ones to check that comments with a space are still accepted.
• Ran cargo test -p pyrefly suppress and cargo test -p pyrefly code_actions.

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[meta-codesync]

@stroxler has imported this pull request. If you are a Meta employee, you can view this in D121014501. (Because this pull request was imported automatically, there will not be any future comments.)

[stroxler]

LGTM, thanks!

I'll aim to get a second review and merge it soon.

[github-actions]

According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅

[grievejia]

Review automatically exported from Phabricator review in Meta.