* automated/tramp-tests.el (tramp-test17-insert-directory):
Make first line "total 123" optional.
(tramp-test20-file-modes, tramp-test22-file-times)
(tramp-test26-process-file, tramp-test27-start-file-process)
(tramp-test28-shell-command): Skip for tramp-gvfs.el and
tramp-smb.el.
(tramp-test20-file-modes): Check for "root" only when there is an
explicit user name.
(tramp-test21-file-links): Handle "... not supported" error.
(tramp-test22-file-times): Skip for "don't know" return values.
(tramp-test26-process-file, tramp-test28-shell-command):
Remove color escape sequences.
(tramp-test28-shell-command): Use `accept-process-output' rather
than `sit-for'.
(tramp-test30-utf8): Set coding system `utf-8'.