[Misc] set single whitespace between log sentences

[cjackal]

Set single whitespace between log / error sentences.

I just grepped logger.*\( and Error( and filtered by counting whitespaces between lines, so the list in this commit is not inclusive.

[github-actions]

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[cjackal]

Gosh I didn't mean to buster call every vllm maintainers, it's just a tiny code quality PR.

[cjackal]

Seems like this PR will be green after #13772 , pre-commit passed on my local repo.

[russellb]

lgtm

[russellb]

the pre-commit failure will be fixed by #13772

[tlrmchlsmth]

LGTM, thanks!

[mgoin]

thanks!