broken check: You should edit tm.texi.in rather than tm.texi

["Martin Liška" <mliska@suse.cz>]

Hello.

I hit the following issue:
/bin/sh /home/marxin/Programming/gcc/gcc/../move-if-change tmp-tm.texi tm.texi
You should edit /home/marxin/Programming/gcc/gcc/doc/tm.texi.in rather than /home/marxin/Programming/gcc/gcc/doc/tm.texi .

Steps to reproduce:
1) modify target.def
2) you will see:

Verify that you have permission to grant a GFDL license for all
new text in /dev/shm/objdir/gcc/tm.texi, then copy it to /home/marxin/Programming/gcc/gcc/doc/tm.texi.

I copy and commit the changes.

3) I made another modification to target.def

Now I face the issue as
	elif test $(srcdir)/doc/tm.texi -nt $(srcdir)/doc/tm.texi.in \
	  && ( test $(srcdir)/doc/tm.texi -nt $(srcdir)/target.def \

So tm.texi.in is older that tm.texi, but it's fine as both tm.texi.in
and tm.texi are not modified.

Ideas how to improve the error message? It took me some time to realize
that 'touch tm.texi.in' is what I need.

Martin