[Texi2html-bug] portability patch for tests

[Tim Rice]

Attached is a patch to address some portability fixes for test suite.

Files patched:
test/run_test.sh
test/many_input_files/tex_l2h.sh
test/many_input_files/tex_t4ht.sh

export VAR=value is not portable. Use VAR=value ; export VAR
grep -q is not portable. redirect to /dev/null
sed -i is not portable.
which on systems derived from USL based code will
return 0 even if the command is not found

Note: diff -u is not portable and the --exclude= is even less
portable but I have made no attempt to address that in this patch.


-- 
Tim Rice                                Multitalents    (707) 887-1469
address@hidden