configure: prefer grep to sed
configure: prefer grep to sed

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