> Add character x.

- [] I've read the [DCO](http://www.offlineimap.org/doc/dco.html).
- [] I've read the [Coding Guidelines](http://www.offlineimap.org/doc/CodingGuidelines.html)
- [] The relevant informations about the changes stands in the commit message, not here.
- [] Code changes follow the style of the files they change.
- [] Code is tested (provide details).

### References

- Bug: #no_space