Dylan DPC 4b50fb3745
Rollup merge of #103919 - nnethercote:unescaping-cleanups, r=matklad
Unescaping cleanups

Some code improvements, and some error message improvements.

Best reviewed one commit at a time.

r? ````@matklad````
2022-11-09 19:21:22 +05:30
..
2022-11-08 15:59:19 +11:00
2022-11-08 15:59:19 +11:00