Improve "rustdoc.md" issue template

[xizheyin]

I rename the title of rustdoc.md to Problem with rustdoc tool, which is clearer.

[jieyouxu]

I can't tell how the changed wording is actually different from the existing wording?

I don't really have strong opinions on this.
r? @apiraino (or reroll)

[joshtriplett]

The text change here doesn't seem like an improvement, and I'm not sure what connection it has to the description of this PR. "bug reports or feature requests, which may be confused with feature requests"?

I don't think this change should be merged in its current form.

[xizheyin]

https://rust-lang.zulipchat.com/#narrow/channel/242269-t-release.2Ftriage/topic/Issue.20templates

Both diagnostic.yaml and the "Feature request" link (pointing to URLO) offer to handle feature requests in two different ways. For slightly different things.

"Feature request" is included in the descriptions of these two places. This may make people who open it for the first time a little confused. So simply say "Create a report for a change to rustc's error output" here.

[apiraino]

So, reading the discussion on Zulip I think there is perhaps a suggestion (see comment) that could be an improvement

• in the documentation.yaml clarify that for rustdoc issues we have a dedicated template, point to it
• "Problem with rustdoc" as title in rustdoc.md could be a bit more explicit
• rename this PR title to reflect the intent (and avoid confusion)
• the other changes could probably be reverted, we don't have a clear feedback about them

We should be careful and deliberate with changes like these because these templates are at the frontline of our issue tracker 🙂

@rustbot author

[xizheyin]

these templates are at the frontline of our issue tracker

I understand, thank you. :)

in the documentation.yaml clarify that for rustdoc issues we have a dedicated template, point to it

#145130 has done it.

"Problem with rustdoc" as title in rustdoc.md could be a bit more explicit

I rename it to Problen with rustdoc tool to be clear. I change the title of PR and revert other changes.

@rustbot ready