[New] jsx-props-no-multi-spaces: Add automatic fix for no line gap between props

[justisb]

Extends automatic fix support to cover the "no line gap" half of the jsx-props-no-multi-spaces rule. There is already automatic fix support for the "only one space" enforcement.

Initially tagging as a [Fix] because it was unexpected that the rule does not fix line gaps when the rule is stated to be automatically fixable in the docs.

[ljharb]

Thanks, looks great!

It's still a [New], though, because one should never assume every error is autofixable :-)

[ljharb]

@justisb ah - because you made this PR from a repo you don't own, i can't rebase it properly (you should only be making PRs from a fork under your own username).

To fix it, can you add me to https://github.com/Popmenu/eslint-plugin-react temporarily? You're free to remove me after the PR is updated.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.52%. Comparing base (dd2e968) to head (b660143).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3929      +/-   ##
==========================================
- Coverage   97.73%   97.52%   -0.22%     
==========================================
  Files         136      133       -3     
  Lines        9997     9996       -1     
  Branches     3715     3717       +2     
==========================================
- Hits         9771     9749      -22     
- Misses        226      247      +21     

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[justisb]

Thanks @ljharb. I just reopened as #3930 with edits from maintainers enabled.

[ljharb]

oof, that leaves this PR as an eternally undeleteable ref on the repo :-/