Fix handling of empty indented MiniYAML comments. #21239
Merged
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An empty MiniYaml comment that was indented was previously not recognized, and instead parsed as a key named '#'. Now, indented comments are recognized as comments, which matches the behaviour for unindented lines.
(Hopefully) fixes #20551
This is a longstanding issue, see 0b8a367 from 4 years ago which fixed parsing of empty comments, but didn't extend the test to cover indented empty comments. D'oh!