editor: implement soft tabs (using 4 spaces)
editor: implement soft tabs (using 4 spaces)

beancount/fava,aumayr/beancount-web,yagebu/fava,yagebu/fava,yagebu/fava,beancount/fava,aumayr/beancount-web,yagebu/fava,beancount/fava,beancount/fava,aumayr/beancount-web,beancount/fava,yagebu/fava,aumayr/beancount-web