Display artifacts when selecting by word

[Pistos]

1. Put this line in a new buffer: class SomeClass < SomeParentClass
2. Set the file type to ruby.
3. Put the cursor on the S of SomeClass.
4. Press Ctrl-space to begin selection.
5. Use Ctrl-arrow or Alt-arrow to repeatedly select and unselect the word SomeClass.
6. See mangled rendering of this line.

Diakonos: Version: 0.9.4
Code Date: July 14, 2014

Ruby version 2.1.2