git-submodule.sh: avoid "test <cond> -a/-o <cond>"

diff --git a/t/lib-gpg.sh b/t/lib-gpg.sh
index 05824fa8e4d18252f74c51531d6504039986c078..fd499e7c498449834992e67645f098d49c6290b8 100755 (executable)
--- a/t/lib-gpg.sh
+++ b/t/lib-gpg.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-gpg_version=`gpg --version 2>&1`
+gpg_version=$(gpg --version 2>&1)
 if test $? = 127; then
        say "You do not seem to have gpg installed"
 else