Change the length of the file so that the change is picked up.

tests/config/snapshot.c

@@ -25,13 +25,13 @@ void test_config_snapshot__create_snapshot(void)
 	cl_assert_equal_i(5, tmp);
 
 	/* Change the value on the file itself (simulate external process) */
-	cl_git_mkfile(filename, "[old]\nvalue = 99\n");
+	cl_git_mkfile(filename, "[old]\nvalue = 999\n");
 
 	cl_git_pass(git_config_snapshot(&new_snapshot, cfg));
 
 	/* New snapshot should see new value */
 	cl_git_pass(git_config_get_int32(&tmp, new_snapshot, "old.value"));
-	cl_assert_equal_i(99, tmp);
+	cl_assert_equal_i(999, tmp);
 
 	/* Old snapshot should still have the old value */
 	cl_git_pass(git_config_get_int32(&tmp, snapshot, "old.value"));