correct installdeps docs to note it's following extra rules

[wchristian]

As discussed, this patch corrects the description of installdeps in various places to stop it giving the appearance of installing all dependencies.

Relates to #528

[miyagawa]

I don' think calling them 'test' is the right wording.

[wchristian]

It's the wording from the in-code comment at https://github.com/miyagawa/cpanminus/blob/devel/lib/App/cpanminus/script.pm#L2212

[miyagawa]

No, that's an explanation why test is included in some situations and not in others.

[wchristian]

Removed the bit about --tests-only --notest as that ignores the cpanfile and thus doesn't work for dists with configure phase dependencies.

[miyagawa]

Removed the bit about --tests-only --notest as that ignores the cpanfile and thus doesn't work for dists with configure phase dependencies.

Well, --tests-only --notest will actually work if you have the right META.json. I get that putting that in --installdeps section might be confusing though.

[wchristian]

So, about the names, do you disagree with the wording in the in-code comment then? How would you word it? I'm happy to adjust both the docs further and include that comment too.

[wchristian]

Ah, didn't see the comment in the review bit, sorry. No editing the comment then. Still curious how you'd word that then? It's important to me that any doc talking about it makes it clear that it will skip some of the deps in cpanfile.

[miyagawa]

I would call it "runtime/test dependencies" if you want to be specific. The fact "build" is included is an artifact that "test" dependencies only exist in META spec v2.