This functionality has been replaced with `<leader>fb`, which used
Telescope to fuzzy find open buffers. This is much better because the
list of buffers is more readable and Telescope supports live preview of
the contents before switching.
The old macro got triggered unintentionally all the time, especially
when leaving Insert mode. The reason was that one way terminals can
emulate <Alt> modifier key is by sending <Esc> rapidly followed by the
key that is supposed to be modified. So, when pressing <Esc> to leave
Insert mode and immediately pressing J to go down, my current line was
moved – not the intended behavior and incredibly annoying.
