Cleanup: PyMethodDef formatting

Missed these changes in [0].

Also replace designated initializers in some C code, as it's not used
often and would need to be removed when converting to C++.

[0] e555ede626

source/blender/python/intern/bpy_app_timers.c

@@ -164,14 +164,14 @@ static struct PyMethodDef M_AppTimers_methods[] = {
 
 static struct PyModuleDef M_AppTimers_module_def = {
     PyModuleDef_HEAD_INIT,
-    "bpy.app.timers",    /* m_name */
-    NULL,                /* m_doc */
-    0,                   /* m_size */
-    M_AppTimers_methods, /* m_methods */
-    NULL,                /* m_slots */
-    NULL,                /* m_traverse */
-    NULL,                /* m_clear */
-    NULL,                /* m_free */
+    /*m_name*/ "bpy.app.timers",
+    /*m_doc*/ NULL,
+    /*m_size*/ 0,
+    /*m_methods*/ M_AppTimers_methods,
+    /*m_slots*/ NULL,
+    /*m_traverse*/ NULL,
+    /*m_clear*/ NULL,
+    /*m_free*/ NULL,
 };
 
 PyObject *BPY_app_timers_module(void)