make update of new settings a bit more general and remove some whitespace
make update of new settings a bit more general and remove some whitespace

* config.update(default_config) does not work, would overwrite all values
Shir0kamii/jrnl,notbalanced/jrnl,MinchinWeb/jrnl,philipsd6/jrnl,flight16/jrnl,zdravi/jrnl,rzyns/jrnl,beni55/jrnl,cloudrave/jrnl-todos,dzeban/jrnl,nikvdp/jrnl,maebert/jrnl,MSylvia/jrnl