When suggesting required arguments, we wanted to avoid an argument
showing up in both a group and by itself but we didn't correctly
calculate that, causing no required arguments to show up at times.
Now, we all use the same pool of information for doing the calculations.
This was the type of cleanup that I expected it to drop our binary size
but this added 1k to our .text. Strange.
Fixes#4004
With us moving the required de-duplication up a level, it made this
check redundant. By removing this check, we're more likely to have an
item in the `incls` which forces a smart usage and reduces the chance of
an `[ARGS]` or `[OPTIONS]`, so a couple of tests changed.
Gave up trying to decipher the existing logic for safe ways to
de-duplicate manually and switched to an `IndexSet` to enforce only one
of each argument exists.
Fixes#3556
For some errors, we use the unroll logic to get the list of required
arguments. The usage then does the same, but without a matcher. This
was causing the lists to not match.
As a side effect, this fixed an ordering issue where we were putting the
present arg after the not-present arg. I assume its because we ended up
reporting the items twice but the first time is correctly ordered and
gets precedence.
This was split out of #3020
This is prep for moving the derive tests. Besides organizing the test
folder for each API, this should reduce link time at the cost of
re-compiling more when a test changes.
