Merlin_recover: move EOF to next line
Merlin_recover: move EOF to next line

This helps completion: instead of making merlin thinks the cursor is
outside the buffer/typedtree when starting completion at EOF, it now
thinks that there is always one more buffer line and will complete in
the appropriate context.

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