tweak printing of Ppat_or for merlin-destruct
tweak printing of Ppat_or for merlin-destruct

the-lambda-church/merlin,rgrinberg/merlin,ocaml/merlin,fxfactorial/merlin,rgrinberg/merlin,dra27/merlin,fxfactorial/merlin,fxfactorial/merlin,dra27/merlin,ocaml/merlin,dra27/merlin,ocaml/merlin,the-lambda-church/merlin,the-lambda-church/merlin,ocaml/merlin,rgrinberg/merlin,rgrinberg/merlin,fxfactorial/merlin,dra27/merlin