Fix issue with pattern match escape. #6061
Merged
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Fixes #6060
The compiler's ppx was missing the same processing on patterns it performs on expressions in string constants: handles "js" string transformation. (On expressions it also handles "j" transformations).
Remove compiler error when it encounters pattern matching with processed string.
Changed compiler compilation to assume the cases in string switch are processed string.
There's still the overarching questions of whether the transformation should be performed in the parser instead.