Auto merge of #61317 - oli-obk:rollup-tm5qivq, r=oli-obk

Rollup of 7 pull requests

Successful merges:

 - #60549 (do not print panic message on doctest failures)
 - #60885 (strip synstructure consts from compiler docs)
 - #61217 (Account for short-hand init structs when suggesting conversion)
 - #61261 (is_union returns ty to avoid computing it twice)
 - #61293 (Print const generics properly in rustdoc)
 - #61310 (split libcore::mem into multiple files)
 - #61313 (Simplify Set1::insert)

Failed merges:

r? @ghost