[PATCH 17/19] t/t5538-push-shallow.sh: convert test -a/-o to && and ||

The interaction with unary operators and operator precedence
for && and || are better known than -a and -o, and for that
reason we prefer them. Replace all existing instances
of -a and -o to save readers from the burden of thinking
about such things.

Signed-off-by: Elia Pinto <redacted>
---
 t/t5538-push-shallow.sh |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/t/t5538-push-shallow.sh b/t/t5538-push-shallow.sh
index 8e54ac5..63d9ca9 100755
--- a/t/t5538-push-shallow.sh
+++ b/t/t5538-push-shallow.sh

@@ -121,7 +121,7 @@ EOF
 	)
 '
 
-if test -n "$NO_CURL" -o -z "$GIT_TEST_HTTPD"; then
+if test -n "$NO_CURL" || test -z "$GIT_TEST_HTTPD"; then
 	say 'skipping remaining tests, git built without http support'
 	test_done
 fi

-- 
1.7.10.4