On comma-separated syntax

[kuraga]

man pkgcheck says:

-k KEYWORD, --keywords KEYWORD
Comma-separated list of keywords to enable and disable for scanning. Any keywords specified in this fashion will be the only keywords that get reported, skipping any disabled keywords.

pkgcheck scan --help says:

-k KEYWORD[,-KEYWORD,...], --keywords KEYWORD[,-KEYWORD,...]
limit keywords to scan for

So, enable or set to? By experiment I see the latter.

And the second: why doesn't work +KEYWORD as for checks?
(The same question for checksets and scopes.)

The third: propose to extend the manual description by comma-separated syntax.