Setting the g:ack_autoclose=1 correctly makes it so that using keyboard shortcuts automatically close the quickfix window. However, if you hit enter (which is supposed to be the same as 'o'), then the quickfix window stays open, despite setting the autoclose option.
Setting the g:ack_autoclose=1 correctly makes it so that using keyboard shortcuts automatically close the quickfix window. However, if you hit enter (which is supposed to be the same as 'o'), then the quickfix window stays open, despite setting the autoclose option.