tests: drop trailing white spaces

Commit 6ff3d00 ("Add check for fcontext lines containing only spaces")
added support for trailing white spaces in file context files together
with some unit tests.  These unit tests contain such trailing white
spaces, which break the current CI due to the white space check via
`git diff-tree --check`.

Drop the trailing spaces (together with the corresponding test code) to
please the CI, hoping regressions will not happen.

tests/check_parse_fc.c

@@ -164,21 +164,11 @@ START_TEST (test_parse_basic_fc_file) {
 
 	cur = cur->next;
 
-	ck_assert_int_eq(cur->flavor, NODE_EMPTY);
-	ck_assert_ptr_nonnull(cur->next);
-
-	cur = cur->next;
-
 	ck_assert_int_eq(cur->flavor, NODE_ERROR);
 	ck_assert_ptr_nonnull(cur->next);
 
 	cur = cur->next;
 
-	ck_assert_int_eq(cur->flavor, NODE_EMPTY);
-	ck_assert_ptr_nonnull(cur->next);
-
-	cur = cur->next;
-
 	ck_assert_int_eq(cur->flavor, NODE_FC_ENTRY);
 	ck_assert_ptr_nonnull(cur->next);
 

tests/sample_policy_files/basic.fc

@@ -1,8 +1,8 @@
 /usr/bin/basic			--		gen_context(system_u:object_r:basic_t, s0)
 /etc/basic(/.*)?				gen_context(system_u:object_r:basic_conf_t, s0)
- 
+
 /var/www/basic					gen_this_is_an_error(system_u:obect_r:basic_conf_t, s0)
-	
+
 /var/log/basic.log		--		system_u:object_r:basic_log_t:s0
 
 /var/www/basic/basic.conf	--		gen_context(system_u:object_r:basic_conf_t, s0, c1)

tests/sample_policy_files/none_context.fc

@@ -1,2 +1,2 @@
 /path/path			<<none>>
-/path/path2			<<none>>  
+/path/path2			<<none>>