If the tracee is restarted from signal-delivery-stop,
the pending signal is injected.
.SS execve(2) under ptrace
-.\" clone(2) THREAD_CLONE says:
+.\" clone(2) CLONE_THREAD says:
.\" If any of the threads in a thread group performs an execve(2),
.\" then all threads other than the thread group leader are terminated,
.\" and the new program is executed in the thread group leader.