Cleanup of [src/menhir.ml]. (#770)
Cleanup of [src/menhir.ml]. (#770)

This is purely for the sake of readability;
there should be no change in functionality.
Code is now shared between the case where [--base]
is used and the case where it isn't.
janestreet/jbuilder,janestreet/jbuilder,dra27/jbuilder,janestreet/jbuilder,dra27/jbuilder,dra27/jbuilder,janestreet/jbuilder,dra27/jbuilder,dra27/jbuilder,dra27/jbuilder,janestreet/jbuilder,janestreet/jbuilder