add_test: Restore support for empty test arguments
This was regressed by refactoring in !8423 (merged). Fix it and add a test case.
Fixes: #24986 (closed)
Backport: release
Topic-rename: add_test-empty-args
Edited by Brad King
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This was regressed by refactoring in !8423 (merged). Fix it and add a test case.
Fixes: #24986 (closed)
Backport: release
Topic-rename: add_test-empty-args