Avoid extra empty lines in plain quoted text: Closes bgo#723815
Avoid extra empty lines in plain quoted text: Closes bgo#723815

Blank lines appear unpredictably in blockquoted text, but would
like to avoid displaying them.

emersion/geary,githubnemo/geary,kpiwko/geary,mjog/geary,tshikaboom/geary,jimbonator/geary,rschroll/geary,AtticHacker/geary,martinra/geary,robol/geary,geekvigilante/geary,glebihan/geary,githubnemo/geary,tshikaboom/geary,emersion/geary,robol/geary,AtticHacker/geary,githubnemo/geary,AtticHacker/geary,emersion/geary,mpdeimos/geary,jimbonator/geary,mjog/geary,MohamedIM/geary-unofficial,glebihan/geary,glebihan/geary,tshikaboom/geary,aatishnn/geary,martinra/geary,aatishnn/geary,aatishnn/geary,jimbonator/geary,mjog/geary,rschroll/geary,martinra/geary,robol/geary