Align timestamps in pg_regress output

This way the timestamps line up in a mix of "ok" and "FAILED" output.

Author: Christoph Berg <christoph.berg@credativ.de>
Discussion: https://www.postgresql.org/message-id/20190321115059.GF2687%40msg.df7cb.de

src/test/regress/pg_regress.c

@@ -1799,7 +1799,7 @@ run_schedule(const char *schedule, test_function tfunc)
 			}
 			else
 			{
-				status(_("ok"));
+				status(_("ok    ")); /* align with FAILED */
 				success_count++;
 			}
 
@@ -1879,7 +1879,7 @@ run_single_test(const char *test, test_function tfunc)
 	}
 	else
 	{
-		status(_("ok"));
+		status(_("ok    ")); /* align with FAILED */
 		success_count++;
 	}