merlin-wrapper: write `.merlin` files conditionnaly -> if the test does not explicitely exports USE_DUNE_READER
merlin-wrapper: write `.merlin` files conditionnaly
-> if the test does not explicitely exports USE_DUNE_READER

rgrinberg/merlin,dra27/merlin,rgrinberg/merlin,rgrinberg/merlin,ocaml/merlin,rgrinberg/merlin,dra27/merlin,ocaml/merlin,dra27/merlin,ocaml/merlin,dra27/merlin,ocaml/merlin