WIP Dot_merlin: make parsing pure
WIP Dot_merlin: make parsing pure

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