Fix crash when multiple `# fmt: skip` comments are used in multi-part if-clause (#4731) (#4872)

* Add trailing newlines to STANDALONE_COMMENT nodes to prevent parsing errors

* Add test cases and revise the approach for issue #4873

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci



* formatting changes required as per the ci failure

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Co-authored-by: cobalt <61329810+cobaltt7@users.noreply.github.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>