Rollup of 9 pull requests#90944

Closed

JohnTitor wants to merge 24 commits intorust-lang:masterfrom

JohnTitor:rollup-5ylhqbn

Commits on Nov 11, 2021

normalize argument b in equate_normalized_inputs_output
b-naber
committed

Commits on Nov 12, 2021

add tests
b-naber
committed

Commits on Nov 13, 2021

Print full char literal on error if any are non-printing
5225225
committed
Suggest removing the non-printing characters
5225225
committed
Remove debug output from test stderr
5225225
committed
Inline printable function
5225225
committed
Fix handling of substitutions and binders when deciding whether to suggest references
JakobDegen
committed

Commits on Nov 14, 2021

fix getting the discriminant of a zero-variant enum
RalfJung
committed

Commits on Nov 16, 2021