Fixed ? appearing in code tag rather than outside it.

Summary:
People translating were rearranging the question so the code tag
appeared and the beginning.  Hence the download_i18n linter was
complaining that a code tag had changed.  Seems like the best
solution is to fix here.

Test Plan: cross-fingers

Reviewers: emily, alpert

Reviewed By: alpert

Differential Revision: http://phabricator.khanacademy.org/D2939