Forbid single '_' in case expr and case methods #2269
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as the else clause is equivalent. Error messages for case expr tell users to use an else clause. For case methods there is no equivalent, but this has not been workin before anyways.
jemc
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as the else clause is equivalent. Error messages for case expr tell users to use an else clause. For case methods there is no equivalent, but this has not been workin before anyways.
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as the else clause is equivalent. Error messages for case expr tell users to use an else clause.
For case methods there is no equivalent, but this has not been workin before anyways.
This fixes a part of #2253