t9001, t9116: avoid pipes

When grepping through the output of a command in the test suite, there
is always a chance that something goes wrong, in which case there would
not be anything useful to debug.

Let's redirect the output into a file instead, and grep that file, so
that the log can be inspected easily if the grep fails.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

t/t9001-send-email.sh

@@ -1194,8 +1194,8 @@ test_expect_success $PREREQ 'in-reply-to but no threading' '
 		--to=nobody@example.com \
 		--in-reply-to="<in-reply-id@example.com>" \
 		--no-thread \
-		$patches |
-	grep "In-Reply-To: <in-reply-id@example.com>"
+		$patches >out &&
+	grep "In-Reply-To: <in-reply-id@example.com>" out
 '
 
 test_expect_success $PREREQ 'no in-reply-to and no threading' '

t/t9116-git-svn-log.sh

@@ -43,14 +43,18 @@ test_expect_success 'setup repository and import' '
 
 test_expect_success 'run log' "
 	git reset --hard origin/a &&
-	git svn log -r2 origin/trunk | grep ^r2 &&
-	git svn log -r4 origin/trunk | grep ^r4 &&
-	git svn log -r3 | grep ^r3
+	git svn log -r2 origin/trunk >out &&
+	grep ^r2 out &&
+	git svn log -r4 origin/trunk >out &&
+	grep ^r4 out &&
+	git svn log -r3 >out &&
+	grep ^r3 out
 	"
 
 test_expect_success 'run log against a from trunk' "
 	git reset --hard origin/trunk &&
-	git svn log -r3 origin/a | grep ^r3
+	git svn log -r3 origin/a >out &&
+	grep ^r3 out
 	"
 
 printf 'r1 \nr2 \nr4 \n' > expected-range-r1-r2-r4