server/gitea: update.sh: Improved usage of quotation markers

roles/server/gitea/templates/update_gitea.sh

@@ -13,15 +13,15 @@ set -e;
 gpg --quiet --keyserver eu.pool.sks-keyservers.net --recv "$GPG_FINGERPRINT";
 
 function error() {
-	echo $@ >&2;
+	echo "$@" >&2;
 }
 
 function as() {
-	sudo -u "$GITEA_USER" $@;
+	sudo -u "$GITEA_USER" "$@";
 }
 
 if [ -f "$GITEA_BIN" ]; then
-    installed=$(cd "$GITEA_DIR" && as "$GITEA_BIN" --version | grep --only-matching --perl-regexp "(?<=version )\d+(\.\d+)*(?= )");
+    installed=$(cd "$GITEA_DIR" && as "$GITEA_BIN" --version | grep --only-matching --perl-regexp '(?<=version )\d+(\.\d+)*(?= )');
 else
     installed=0;
 fi