Dumper.p.write: add trailing newline
Dumper.p.write: add trailing newline

Have Dumper.prototype.write automatically add a trailing newline if one is not already present.  This is in preparation for adding indentation automatically as well - note that it forces a change to ScopeDumper.prototype.dumpBinding to call .write() just once.

NeilFraser/CodeCity,google/CodeCity,NeilFraser/CodeCity,google/CodeCity,NeilFraser/CodeCity,google/CodeCity,google/CodeCity,NeilFraser/CodeCity