internal/tdtest: document how the name field is used
This detail wasn't clear from the doc comments.
Signed-off-by: Roger Peppe <rogpeppe@gmail.com>
Change-Id: I92f70df872244e6379692ddb756dbde1bd26ecd9
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1170245
TryBot-Result: CUEcueckoo <cueckoo@cuelang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Unity-Result: CUE porcuepine <cue.porcuepine@gmail.com>
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