swiper.el (swiper-all): New command to swiper all file buffers
* swiper.el (swiper--candidates): Add NUMBERS-WIDTH arg. It could be
done better by calculating the line count of each buffer and then
getting the max of that, but this way is faster, since the collections
are traversed only once.
(swiper-multi): Update.
(swiper-all): New command. This is like `swiper-multi' where the buffer
list is pre-selected to be all file visiting buffers.
(swiper--multi-candidates): New defun.
(swiper-multi-action-1): Use `swiper--multi-candidates'.
(swiper-multi-action-2): Update - the line number is in the 'display
property of the first char.