My urfave/cli version is

latest v2

Checklist

• Are you running the latest v2 release? The list of releases is here.
• Did you check the manual for your release? The v2 manual is here
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Describe the bug

Commit: 8227be1
introduced a backward compatibility issue. As before non categorized flags would show alongside categorized flags. After this commit non categorized do not show at all.

To reproduce

TestCommand_VisibleFlagCategories is a direct test of the breaking change, Just because no category is set, the flag should not be invisible.

Expected behavior

Flags should show in help unless explicitly hidden

Want to fix this yourself?

Sure, I'll introduce a PR shortly

Run go version and paste its output here

go version go1.19.4 linux/amd64