bad display when correct to a "/me"
Bug description
Gajim displays *[00:00:00] Nickname: Nickname message instead of *[00:00:00] Nickname message.
Related tickets: #7400 (closed), #7414 (closed).
Steps to reproduce
Write a message and correct it to a /me message.
Software versions
OS version: Salix OS 14.0.1 (Slackware 14.0 based) GTK version: 2.24.10 PyGTK version: 2.24.0