So you mean to say you forgot the file you have editred? If yes,
Usually, your modification should be in site_root/qa-theme/Snow/qa-theme.php file find your code there.
If not than may be in any plugin file or qa-theme-base.php
If it is in plugin than you need to find it yourself, but if not in Snow/qa-theme.php than check in siteroot/qa-include/qa-theme-base.php
Find your code and fix it.
If you have used any editor, that might have recent file listed in File menu. There you can check which file you have opended to modify.