minor fix to not break tracebacks on displaying a utf-8 encoded string
minor fix to not break tracebacks on displaying a utf-8 encoded string

furbrain/Coherence,coherence-project/Coherence,ismaelgaudioso/Coherence,unintended/Cohen,unintended/Cohen,coherence-project/Coherence,opendreambox/python-coherence,ismaelgaudioso/Coherence,sreichholf/python-coherence,sreichholf/python-coherence,opendreambox/python-coherence,furbrain/Coherence