Completing a user link in the comment (description) field places the cursor in the wrong place.

1. Create a user called matchme. It has to be at the start of the comment.
2. (BUG) In a comment field type [~match] and then complete the user by hitting enter. Note that the completion will leave the cursor just before the last ].

These steps are shown in wiki_complete.webm.

I expect the cursor to be placed after the last ] so that I can continue typing.