Show repeating line in stacktrace in bold red

[xlxs4]

Before:

After:

---

This can be useful to identify when traces are longer, as shown in the screenshot taken from the slack thread (lu is repeating):

[gbaraldi]

I like it

[kimikage]

xref: #52334 (comment)

Regardless of whether it is fair use or not, indicating the source of the image or example is an obvious consideration.
I happened to see the originating Slack post, but not all know about the context.

[LilithHafner]

Closed in favor of #54714