patch 9.0.1529: code style test doesn't check for space after "if"

Problem:    Code style test doesn't check for space after "if".
Solution:   Add a test for space.
diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index 567b839..45ccb52 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -508,7 +508,7 @@
 		    i++;
 		break;
 	    case CMD_tabdo:
-		for( ; tp != NULL && i + 1 < eap->line1; tp = tp->tp_next)
+		for ( ; tp != NULL && i + 1 < eap->line1; tp = tp->tp_next)
 		    i++;
 		break;
 	    case CMD_argdo: