t/t5538-push-shallow.sh: use the $( ... ) construct for command substitution

diff --git a/t/lib-httpd.sh b/t/lib-httpd.sh
index e9714467d05e57eded6f37c3d5f07b91f63cc9fc..f9f3e5fd82e1b34d87993f750bd05e46e69bd82c 100644 (file)
--- a/t/lib-httpd.sh
+++ b/t/lib-httpd.sh
@@ -98,8 +98,8 @@ then
        test_skip_or_die $GIT_TEST_HTTPD "no web server found at '$LIB_HTTPD_PATH'"
 fi
 
-HTTPD_VERSION=`$LIB_HTTPD_PATH -v | \
-       sed -n 's/^Server version: Apache\/\([0-9]*\)\..*$/\1/p; q'`
+HTTPD_VERSION=$($LIB_HTTPD_PATH -v | \
+       sed -n 's/^Server version: Apache\/\([0-9]*\)\..*$/\1/p; q')
 
 if test -n "$HTTPD_VERSION"
 then