Adds these keys, inspired by tpope/vim-unimpaired:
[ SPC, ] SPC (or [o, ]o)
Add COUNT blank lines above/below the cursor
[f, ]f
Visit previous/next file in current folder, alphabetically
[u, ]u
Url encode/decode operators
[y, ]y
C-string-style escaping/unescaping operators (escapes quotes,
backslashes and control characters)
[x, ]x
XML entity encoding/decoding operators (only if :lang web is enabled)
[F, ]F
Focus previous/next frame (decided this is better than ]t/[t which is
being used by hl-todo-{next,previous})
We already had gp and ]b/[b (buffers).
We're not going to port ]e/[e because it is redundant with ddp/ddP or gx
(evil-exchange). I also think these keybinds are better suited to
{next,previous}-error.
0b1ecb8105