2d7795dfb9
No longer track "zero-width" chars in `SourceMap`, read directly from the line when calculating the `display_col` of a `BytePos`. Move `char_width` to `rustc_span` and use it from the emitter.
This change allows the following to properly align in terminals (depending on the font, the replaced control codepoints are rendered as 1 or 2 width, on my terminal they are rendered as 1, on VSCode text they are rendered as 2):
```
error: this file contains an unclosed delimiter
--> $DIR/issue-68629.rs:5:17
|
LL | ␜␟ts␀![{i
| -- unclosed delimiter
| |
| unclosed delimiter
LL | ␀␀ fn rݻoa>rݻm
| ^
```
|
||
|---|---|---|
| .. | ||
| str-array-assignment.rs | ||
| str-array-assignment.stderr | ||
| str-as-char.fixed | ||
| str-as-char.rs | ||
| str-as-char.stderr | ||
| str-concat-on-double-ref.rs | ||
| str-concat-on-double-ref.stderr | ||
| str-escape.rs | ||
| str-escape.stderr | ||
| str-idx.rs | ||
| str-idx.stderr | ||
| str-lit-type-mismatch.rs | ||
| str-lit-type-mismatch.stderr | ||
| str-mut-idx.rs | ||
| str-mut-idx.stderr | ||
| str-overrun.rs | ||