lint-docs: Add redirects for renamed lints.
This updates the lint docs to include a redirect for renamed lints to the new name. This helps ensure that links to the old name will still be valid.
Note that this currently uses a hard-coded list. As mentioned in the comment, a future enhancement may gather this information in a better way.
Unblocks #123680
This was not the correct fix. The problem was two-fold:
- `download-rustc` didn't respect `llvm.assertions`
- `rust-dev` was missing a bump to `download-ci-llvm-stamp`
The first is fixed in this PR and the latter was fixed a while ago. Revert this change to avoid breaking `rpath = false`.
Bootstrap was setting LD_LIBRARY_PATH for bootstrap tools in `tool_cmd`,
and rustc inherited that environment. That broke when download-rustc was
enabled; see the new comment for details.
Some examples may contain multiple lines which trigger the lint.
Previously it would only display the first message.
This updates it so that all matching instances of the lint are displayed.
If a lint example has an `ignore` tag, but the lint author also includes
the {{produces}} marker, then the output will just contain the text
`{{produces}}`. This adds a check for this mistake and provides help on
how the lint docs should be written.
This also adjusts the lint docs generation to accept (and ignore) an allow
attribute, rather than expecting the documentation to be immediately followed by
the lint name.
Since RFC 3052 soft deprecated the authors field anyway, hiding it from
crates.io, docs.rs, and making Cargo not add it by default, and it is
not generally up to date/useful information, we should remove it from
crates in this repo.
Some errors, like if rustc is broken, or dylib search path is wrong,
will only display non-JSON errors. Show those, too, to make it easier to
debug a problem.
