Automattic/jetpack — pull request #1207 by jeherve (2014-10-19 13:55:15+00:00)
Title: Sharing: prevent duplicate @ in shared Tweets

This used to happen because Publicize's Twitter Connection Data saves the Twitter handle with an "@". The attached commit makes sure we always remove extra @, even after `jetpack_sharing_twitter_via` overwrote the previous `$twitter_site_tag_value` value.

cc @kraftbj since we discussed about it last week.