Fix repr() on transactions with unicode labels
Fix repr() on transactions with unicode labels

repr only wants str.

Boussadia/weboob,frankrousseau/weboob,RouxRC/weboob,franek/weboob,sputnick-dev/weboob,nojhan/weboob-devel,nojhan/weboob-devel,Konubinix/weboob,laurent-george/weboob,sputnick-dev/weboob,franek/weboob,Boussadia/weboob,sputnick-dev/weboob,franek/weboob,Boussadia/weboob,yannrouillard/weboob,Konubinix/weboob,laurent-george/weboob,frankrousseau/weboob,yannrouillard/weboob,RouxRC/weboob,yannrouillard/weboob,willprice/weboob,frankrousseau/weboob,nojhan/weboob-devel,willprice/weboob,willprice/weboob,Konubinix/weboob,laurent-george/weboob,RouxRC/weboob,Boussadia/weboob