So, say you want to point at the exact place in a stack trace where the error is in HTML.
You might think, “I’ll use the text-emphasis CSS property” but that messes up line height.
So, instead, with a span surrounding the error location, try this (just realised the lh/rlh units are now widely supported):
```css
span.error-column::before {
color: deeppink;
content: '^';
position: relative;
margin-right: -1ch;
top: 1rlh;
}
```
(Deeppink colour optional.) ;)
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