descriptions: fix bad json output (#11350)

---------

Co-authored-by: Mihai Fufezan <mihai@fufexan.net>

hyprtester/src/tests/main/hyprctl.cpp

@@ -0,0 +1,35 @@
+#include "tests.hpp"
+#include "../../shared.hpp"
+#include "../../hyprctlCompat.hpp"
+#include <print>
+#include <thread>
+#include <chrono>
+#include <hyprutils/os/Process.hpp>
+#include <hyprutils/memory/WeakPtr.hpp>
+#include <csignal>
+#include <cerrno>
+#include "../shared.hpp"
+
+static int ret = 0;
+
+using namespace Hyprutils::OS;
+using namespace Hyprutils::Memory;
+
+#define UP CUniquePointer
+#define SP CSharedPointer
+
+static bool test() {
+    NLog::log("{}Testing hyprctl", Colors::GREEN);
+
+    {
+        NLog::log("{}Testing hyprctl descriptions for any json errors", Colors::GREEN);
+        CProcess jqProc("bash", {"-c", "hyprctl descriptions | jq"});
+        jqProc.addEnv("HYPRLAND_INSTANCE_SIGNATURE", HIS);
+        jqProc.runSync();
+        EXPECT(jqProc.exitCode(), 0);
+    }
+
+    return !ret;
+}
+
+REGISTER_TEST_FN(test);