Also skip filtering null modifications when --quiet is passed to brew update

[boblail]

(We're already skipping this when --preinstall is passed)

This change is orthogonal to (not instead of) optimizing this filtering logic (See #13244, #13243 discussion)

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[MikeMcQuaid]

Some optional ideas to tweak naming.

This approach makes sense to me but, given most users will literally only ever use brew update --preinstall, I debate whether we should consider consolidating the behaviour/output because I'm not terribly sure "more output on --preinstall because it's faster" is a very sensible default (despite by deciding it long ago).

[boblail]

I'm not terribly sure "more output on --preinstall because it's faster" is a very sensible default

Agreed!! Do you think --preinstall should imply --quiet? If so, I'll make that PR. If not, maybe we can stop altering the behavior for --preinstall after we've found the right optimization.

[MikeMcQuaid]

Agreed!! Do you think --preinstall should imply --quiet? If so, I'll make that PR. If not, maybe we can stop altering the behavior for --preinstall after we've found the right optimization

I'm unsure! Will ask questions in other PR too. Note: I'm on vacation next week so will be unresponsive.

[MikeMcQuaid]

I think #13299 may remove the need for this but interested in thoughts.

[github-actions]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs.

[boblail]

Closing in favor of recent brew update changes.