Added 'edit:move-dot-left-small-word' and 'edit:move-dot-right-small-word' (#696)
Added 'edit:move-dot-left-small-word' and 'edit:move-dot-right-small-word' (#696)

Following the examples of 'kill-small-word-left' and the 'move-dot-*-word'
functions, I added two new functions to move the cursor left or right,
stopping at the next "small word".

This would typically be used for Ctrl+Left & Right, e.g.:

edit:insert:binding[Ctrl+Left]=$edit:move-dot-left-small-word~
edit:insert:binding[Ctrl+Right]=$edit:move-dot-right-small-word~
elves/elvish,elves/elvish,elves/elvish,elves/elvish,elves/elvish