emacs: lazily compute default values.
emacs: lazily compute default values.

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