Previously, many tests in emacs-subject-to-filename didn't quote the
$output argument to test_expect_equal. As a result, if $output was
empty, test_expect_equal would be passed only one argument and would
abort the entire test script. By quoting the argument, we ensure
test_expect_equal will always receive two arguments.
There are currently 45 TESTS scripts. 36 of those load
test-lib.sh using '. ./test-lib.sh' and 9 '. test-lib.sh'.
In latter case test-lib.sh is first searched from directories
in PATH (posix) and then from current directory (bash feature).
Changed the 9 files to execute '. ./test-lib.sh'. The test-lib.sh
should never be loaded from directory in PATH.
The behaviour of "emacsclient --eval nil" changed from emacs23 to
emacs24, and in emacs24 it prints 'nil' rather than an empty string.
(format "%S" foo) produces a sexpr form of foo, and is consistent
between the two versions.
