Prevent obvious duplicate inherits

[matt-sheets]

Previously we allow the user to do something like: resource baz inherits foo, foo, bar

This is either a needless duplicate or a possible typo. The compiler will now produce an error if a duplicate inherit like this is present.

[dburgener]

You're failing the "cargo fmt" check. You'll need to get the rustfmt package via rustup (https:/rust-lang/rustfmt) and then run cargo fmt, which will automatically clean up the formatting.

The next check after that, which didn't run because fmt failed is clippy, so you may want to also get and run clippy as well (https:/rust-lang/rust-clippy). The exact clippy command used by the CI is available in .github/workflows/clippy.sh. You'll want to make sure you use "-A clippy::new_without_default" to avoid unrelated failures.

[dburgener]

I tried to squash and merge this using the github interface, but I'm running in to this issue: isaacs/github#1368

Instead of saying the commit was authored by [email protected] as desired, it's using an internally generated users.noreply.github.com e-mail address for you, that I assume is set as a default in your settings somewhere (probably the "Keep my e-mail address private" box at https:/settings/emails).

Are you able to uncheck the box above so I can hopefully get this to squash merge with the right attribution?

[matt-sheets]

Are you able to uncheck the box above so I can hopefully get this to squash merge with the right attribution?

I updated that setting, I would try again.

[dburgener]

Merged. Github still messed it up a little bit as your author name in the original commits was "Matt Sheets", but the github squash merge changed it to "matt-sheets" without warning me that it would... But at least the e-mail address is correct. That might be because your "Name" https:/settings/profile is set to "matt-sheets"?

The whole thing is kind of obnoxious. I may just stick to manual squash and force push in the future.

Regardless, this is now merged. Thanks for the contribution!