With -vv, display the full skip/xfail reason instead of "..."

[Akuli]

Closes #9536

[bluetech]

Makes sense to me

[eamanu]

IMO you need to add this option to see it in pytest --help

[Akuli]

-v, --verbose increase verbosity.

What else do you want?

[eamanu]

-vv what's the meaning?

[Akuli]

-v is already in the help, and it can be specified multiple times, like -vv. This isn't anything that this PR adds, and pytest already has other features that do something different when -v or -vv is passed.

What exactly do you want me to add to the help message?

[eamanu]

What exactly do you want me to add to the help message?

I'm just giving an opinion about that I'd like to know in pytest --help that if I use -vv I will have more details. No more than. I'm not core maintainer, so you can just ignore me.

[nicoddemus]

Thanks!