[FIX] mail: show mention link at the end of a message content

Before this commit, when mentioning a user at the end of a message,
no link was shown.

The cause is that any mention should end with whitespace, but during
the preprocessing of a message, the message is trimmed, which removes
the final whitespace of the mention.

We would like to keep trimming at the preprocessing of the message,
but we can relax a bit the regex to detect a mention, so that it is
not necessary to have a whitespace at the end of a matched mention.

0 files changed, 0 insertions, 0 deletions