This PR sets up the new integrated test/bench suite. It then migrates
all benchmarks and some related tests to the new suite. There's also
some documentation and some linting.
For now, a lot of the old tests are left alone so this PR doesn't become
even larger than it already is. Eventually, all tests should be migrated
to the new suite though so there isn't a confusing mix of two systems.
This PR makes `#guard_msgs` to treat `trace` messages separate from
`info`, `warning` and `error`. It also introduce the ability to say
`#guard_msgs (pass info`, like `(drop info)` so far, and also adds
`(check info)` as the explicit form of `(info)`, for completeness.
Fixes#8266
Specializes the congr lemma generated for the `arg` conv tactic to only
rewrite the chosen argument. This makes it much more likely that the
chosen argument is able to be accessed.
Lets `arg` access the domain and codomain of pi types via `arg 1` and
`arg 2` in more situations. Upstreams `pi_congr` for this from mathlib.
Adds a negative indexing option, where `arg -2` accesses the
second-to-last argument for example, making the behavior of `lhs`
available to `arg`. This works for `enter` as well.
Other improvement: when there is an error in the `enter [...]` tactic,
individual locations get underlined with the error. The tactic info now
also is like `rw`, so you can see the intermediate conv states.
Closes#5871
