Cause `texinfo-insert-@node' to insert a carriage return after the

Cause `texinfo-insert-@node' to insert a carriage return after the
comment line.  This change does not affect normal use.  On the one
hand, it causes the command to insert a blank line when invoked on the
line preceeding the @section line.  This is a fault.  On the other
hand, it causes the command to format the output properly when you
invoke the command on the same line as the @chapter or similar line.
This is beneficial.