cue/testdata: add test cases for #3924
Reduced test cases from cuelang.org/docs content show that
edge cases involving ellipsis and matchN no longer fail with
closedness errors as we expect them to.
For #3924.
Signed-off-by: Daniel Martí <mvdan@mvdan.cc>
Change-Id: Ia0bae2c8c97f4d5b4bd6dbcbf50d64685163f9a9
Reviewed-on: https://review.gerrithub.io/c/cue-lang/cue/+/1215073
TryBot-Result: CUEcueckoo <cueckoo@cuelang.org>
Unity-Result: CUE porcuepine <cue.porcuepine@gmail.com>
Reviewed-by: Marcel van Lohuizen <mpvl@gmail.com>