Fix and enable disabled code action unit tests, fix fallback handler#643

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jneira merged 7 commits intohaskell:masterfrom

peterwicksstringfield:enable_code_action_tests

Dec 3, 2020

Commits on Dec 2, 2020

Add hie.yaml files in testdata to help CI run.
peterwicksstringfield
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In tests, filter out diagnostics from other files.
peterwicksstringfield
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