Auto merge of #73746 - Manishearth:rollup-80jnynm, r=Manishearth

Auto merge of #73746 - Manishearth:rollup-80jnynm, r=Manishearth

Rollup of 14 pull requests

Successful merges:

 - #72617 (Add a fast path for `std::thread::panicking`.)
 - #72738 (Self contained linking option)
 - #72770 (Implement mixed script confusable lint.)
 - #73418 (Add unstable `core::mem::variant_count` intrinsic)
 - #73460 (Emit line info for generator variants)
 - #73534 (Provide suggestions for some moved value errors)
 - #73538 (make commented examples use valid syntax, and be more consistent )
 - #73581 (Create 0766 error code)
 - #73619 (Document the mod keyword)
 - #73621 (Document the mut keyword)
 - #73648 (Document the return keyword)
 - #73673 (Fix ptr doc warnings.)
 - #73674 (Tweak binop errors)
 - #73687 (Clean up E0701 explanation)

Failed merges:

 - #73708 (Explain move errors that occur due to method calls involving `self` (take two))

r? @ghost