fix push_directory, pop_directory

install.sh

@@ -9,11 +9,11 @@ readonly MAIN_TAR_GZ_URL="https://git.artcode.re/miaou/miaou-bash/archive/main.t
 ## FUNCTIONS
 
 function push_directory {
-    pushd "$1" || echo "unable to push directory <$1>" && exit 1
+    pushd "$1" || (echo "unable to push directory <$1>" && exit 1)
 }
 
 function pop_directory {
-    popd || echo "unable to pop from previous directory" && exit 1
+    popd || (echo "unable to pop from previous directory" && exit 1)
 }
 
 function root_required {