Guillaume Gomez 5a8619b435
Rollup merge of #85221 - ijackson:dbg-doc-re-tests, r=joshtriplett
dbg macro: Discuss use in tests, and slightly clarify

As discussed in a tangent in #82778.

I chose to use [semantic newlines](https://rhodesmill.org/brandon/2012/one-sentence-per-line/) in the source text but I don't mind reformatting it.
2021-05-15 13:29:50 +02:00
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