Use hyphens for action usage output #1249
Merged
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Currently action usage output looks like:
alr action [options] [post_fetch|pre_build|post_build|test]
,but it should look like:
alr action [options] [post-fetch|pre-build|post-build|test]
,because TOML expects keys to be hyphenated.
This PR fixes #1230 by replacing underscores with hyphens.