whitespace cleanup

Remove all trailing whitespace and space before tabs.
diff --git a/tc/tc_class.c b/tc/tc_class.c
index e56bf07..ba7869b 100644
--- a/tc/tc_class.c
+++ b/tc/tc_class.c
@@ -79,7 +79,7 @@
 		} else if (strcmp(*argv, "handle") == 0) {
 			fprintf(stderr, "Error: try \"classid\" instead of \"handle\"\n");
 			return -1;
- 		} else if (strcmp(*argv, "root") == 0) {
+		} else if (strcmp(*argv, "root") == 0) {
 			if (req.t.tcm_parent) {
 				fprintf(stderr, "Error: \"root\" is duplicate parent ID.\n");
 				return -1;
@@ -286,7 +286,7 @@
 		argc--; argv++;
 	}
 
- 	ll_init_map(&rth);
+	ll_init_map(&rth);
 
 	if (d[0]) {
 		if ((t.tcm_ifindex = ll_name_to_index(d)) == 0) {
@@ -296,12 +296,12 @@
 		filter_ifindex = t.tcm_ifindex;
 	}
 
- 	if (rtnl_dump_request(&rth, RTM_GETTCLASS, &t, sizeof(t)) < 0) {
+	if (rtnl_dump_request(&rth, RTM_GETTCLASS, &t, sizeof(t)) < 0) {
 		perror("Cannot send dump request");
 		return 1;
 	}
 
- 	if (rtnl_dump_filter(&rth, print_class, stdout) < 0) {
+	if (rtnl_dump_filter(&rth, print_class, stdout) < 0) {
 		fprintf(stderr, "Dump terminated\n");
 		return 1;
 	}