cleanup, docs

site/doc/pages/task_kill.txt

@@ -1,5 +1,5 @@
 :sig
-int task_kill(pid_t pid, int sig = 0)
+int task_kill(pid_t pid, s32 sig = 0)
 
 :params
 pid : PID of the process
@@ -22,4 +22,6 @@ Wraps the standard POSIX `kill()` function for positive process IDs.
 Passing `0` as the signal performs an existence and permission check without actually delivering a signal.
 
 :example
-print("task_kill example\n");
+task("doc-demo-kill", []() { usleep(3000000); });
+pid_t pid = task_pid("doc-demo-kill");
+print(pid > 0 && task_kill(pid) == 0 ? "task signalled to stop" : "no task to kill", "\n");