emacs: pass an explicit prefix to ac to fix prefix detection in earlier version of emacs (23.2).
emacs: pass an explicit prefix to ac to fix prefix detection in earlier version of emacs (23.2).

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