* aclocal.m4, bin/autoconf.as, lib/autoconf/autoconf.m4,

* aclocal.m4, bin/autoconf.as, lib/autoconf/autoconf.m4,
* lib/autoconf/autoheader.m4, lib/autoconf/autoupdate.m4,
* lib/autoconf/c.m4, lib/autoconf/fortran.m4,
* lib/autoconf/general.m4, lib/autoconf/headers.m4,
* lib/autoconf/lang.m4, lib/autoconf/libs.m4,
* lib/autoconf/programs.m4, lib/autoconf/specific.m4,
* lib/autoconf/status.m4, lib/autoconf/types.m4,
* lib/autotest/general.m4, lib/m4sugar/m4sugar.m4,
* tests/atspecific.m4, tests/base.at, tests/compile.at,
* tests/foreign.at, tests/m4sh.at, tests/semantics.at,
* tests/tools.at, tests/torture.at:
Whitespace clean up.
Suggested by Jim Meyering.