Fix whitespace

contrib/test_shm_mq/setup.c

@@ -279,7 +279,7 @@ wait_for_workers_to_become_ready(worker_state *wstate,
 				break;
 			}
 
-  			/* Wait to be signalled. */
+			/* Wait to be signalled. */
 			WaitLatch(&MyProc->procLatch, WL_LATCH_SET, 0);
 
 			/* An interrupt may have occurred while we were waiting. */

contrib/test_shm_mq/worker.c

@@ -126,7 +126,7 @@ test_shm_mq_main(Datum main_arg)
 	++hdr->workers_ready;
 	SpinLockRelease(&hdr->mutex);
 	registrant = BackendPidGetProc(MyBgworkerEntry->bgw_notify_pid);
-	if (registrant == NULL)		
+	if (registrant == NULL)
 	{
 		elog(DEBUG1, "registrant backend has exited prematurely");
 		proc_exit(1);