[PATCH v1] generic/63{4,5}: Modify criteria for passing test

[Joanne Chang <joannechien@google.com>]

The two tests pass when a timestamp is not preserved after the remount,
because "cmp -s" does not print to the output file, and status is set to
0 regardless of the return value of cmp. So, use "diff" instead to
correctly fail the test and flag the error case in the output file.

Also, as the tests are focused on timestamps, don't print file contents
so the tests can still pass if only the file contents differ.

Signed-off-by: Joanne Chang <joannechien@google.com>
---
 tests/generic/634 | 4 ++--
 tests/generic/635 | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tests/generic/634 b/tests/generic/634
index 8a4210a3..d7dd9dd8 100755
--- a/tests/generic/634
+++ b/tests/generic/634
@@ -52,7 +52,7 @@ touchme() {
 report() {
 	local files=($SCRATCH_MNT/t_*)
 	for file in "${files[@]}"; do
-		echo "${file}: $(cat "${file}")"
+		echo "${file}:"
 		TZ=UTC stat -c '%y %Y %n' "${file}"
 		test $test_statx -gt 0 && \
 			$XFS_IO_PROG -c 'statx -r' "${file}" | grep 'stat.mtime'
@@ -98,7 +98,7 @@ report > $tmp.after_remount
 cat $tmp.after_remount >> $seqres.full
 
 # Did they match?
-cmp -s $tmp.before_remount $tmp.after_remount
+diff $tmp.before_remount $tmp.after_remount
 
 # success, all done
 echo Silence is golden.
diff --git a/tests/generic/635 b/tests/generic/635
index 018b868c..f74d0cd7 100755
--- a/tests/generic/635
+++ b/tests/generic/635
@@ -55,7 +55,7 @@ touchme() {
 report() {
 	local files=($SCRATCH_MNT/t_*)
 	for file in "${files[@]}"; do
-		echo "${file}: $(cat "${file}")"
+		echo "${file}:"
 		TZ=UTC stat -c '%y %Y %n' "${file}"
 		test $test_statx -gt 0 && \
 			$XFS_IO_PROG -c 'statx -r' "${file}" | grep 'stat.mtime'
@@ -102,7 +102,7 @@ report > $tmp.after_crash
 cat $tmp.after_crash >> $seqres.full
 
 # Did they match?
-cmp -s $tmp.before_crash $tmp.after_crash
+diff $tmp.before_crash $tmp.after_crash
 
 # success, all done
 status=0
-- 
2.54.0.929.g9b7fa37559-goog