…r reporting

…etition

…illaumeGomez

do not print panic message on doctest failures

This PR cleans up rustdoc test output by silently unwinding on failure instead of using `panic!`. It also improves the clarity and consistency of the output on test failure, and adds test cases for failure modes that were previously untested.

…=GuillaumeGomez

strip synstructure consts from compiler docs

Fixes rust-lang#60150.

Unfortunately this PR depends on the use of the deprecated `--passes` flag in bootstrap to keep the `--strip-hidden` pass while still documenting private items. I've opened rust-lang#60884 to track stabilization of a new flag that encapsulates this behavior.

r? @QuietMisdreavus

Do not ICE on missing access place description during mutability error reporting

Fix rust-lang#61187.

Account for short-hand init structs when suggesting conversion

Fix rust-lang#52820.

…i-obk

is_union returns ty to avoid computing it twice

r? @oli-obk

… r=GuillaumeGomez

Print const generics properly in rustdoc

Now that rust-lang#59276 is merged, we can print consts properly in rustdoc.

Fixes rust-lang#60737.
Fixes rust-lang#61257.

r? @GuillaumeGomez

split libcore::mem into multiple files

r? @Centril

Simplify Set1::insert

r? @varkor