tar: remove trailing white space from source files

* ChangeLog.1, ChangeLog.CVS, Makefile.am, NEWS, README:
* README-hacking, directory, doc/Makefile.am, doc/dumpdir.texi:
* doc/gendocs_template, doc/intern.texi, doc/mastermenu.el:
* doc/snapshot.texi, doc/sparse.texi, doc/tar-snapshot-edit.texi:
* doc/value.texi, lib/Makefile.am, scripts/backup-specs:
* scripts/dump-remind.in, scripts/tar-snapshot-edit, scripts/tarcat:
* scripts/xsparse.c, src/arith.h, src/buffer.c, src/compare.c:
* src/create.c, src/delete.c, src/exit.c, src/suffix.c, src/tar.c:
* src/tar.h, src/update.c, src/warning.c, src/xheader.c:
* tests/append01.at, tests/append02.at, tests/atlocal.in:
* tests/delete03.at, tests/exclude.at, tests/exclude06.at:
* tests/extrac04.at, tests/extrac05.at, tests/extrac06.at:
* tests/extrac07.at, tests/filerem01.at, tests/filerem02.at:
* tests/incr01.at, tests/incr02.at, tests/incr03.at, tests/incr06.at:
* tests/label02.at, tests/label03.at, tests/label04.at:
* tests/label05.at, tests/link02.at, tests/link03.at:
* tests/listed01.at, tests/listed02.at, tests/long01.at:
* tests/longv7.at, tests/multiv01.at, tests/multiv02.at:
* tests/multiv03.at, tests/multiv05.at, tests/multiv06.at:
* tests/multiv07.at, tests/multiv08.at, tests/options.at:
* tests/options02.at, tests/remfiles03.at, tests/rename01.at:
* tests/rename02.at, tests/rename03.at, tests/rename04.at:
* tests/rename05.at, tests/same-order01.at, tests/same-order02.at:
* tests/shortfile.at, tests/shortupd.at, tests/sparse01.at:
* tests/sparse02.at, tests/sparsemv.at, tests/sparsemvp.at:
* tests/star/README, tests/star/gtarfail2.at:
* tests/star/multi-fail.at:
* tests/star/pax-big-10g.at, tests/star/quicktest.sh:
* tests/star/ustar-big-2g.at, tests/star/ustar-big-8g.at:
* tests/update01.at, tests/update02.at, tests/volsize.at:
* tests/volume.at:
Remove trailing spaces and tabs from lines, and remove
trailing empty lines from files.  This makes it a bit easier
to share code among coreutils and other projects that do this.