docs: correct dompmwakeup description

tools/virsh-domain.c

@@ -2242,9 +2242,9 @@ cleanup:
  */
 
 static const vshCmdInfo info_dom_pm_wakeup[] = {
-    {"help", N_("wakeup a domain suspended by dompmsuspend command")},
-    {"desc", N_("Wakeup a domain previously suspended "
-                "by dompmsuspend command.")},
+    {"help", N_("wakeup a domain from pmsuspended state")},
+    {"desc", N_("Wakeup a domain that was previously suspended "
+                "by power management.")},
     {NULL, NULL}
 };
 

tools/virsh.pod

@@ -1523,9 +1523,10 @@ domain's guest OS.
 
 =item B<dompmwakeup> I<domain>
 
-Wakeup a domain suspended by dompmsuspend command. Injects a wakeup
-into the guest that previously used dompmsuspend, rather than waiting
-for the previously requested duration (if any) to elapse.
+Wakeup a domain from pmsuspended state (either suspended by dompmsuspend or
+from the guest itself). Injects a wakeup into the guest that is in pmsuspended
+state, rather than waiting for the previously requested duration (if any) to
+elapse. This operation doesn't not necessarily fail if the domain is running.
 
 =item B<ttyconsole> I<domain>