Junegunn Choi 2c26f02f5c Improve preview window update events ...

- Update preview window even if there is no match for the query string
  if any of the placeholder expressions evaluates to a non-empty string.
- Also, if the command template contains {q}, preview window will be
  updated if the query string changes even though the focus remains on
  the same item.

An example:

    git log --oneline --color=always |
       fzf --reverse --ansi --preview \
       '[ -n {1} ] && git show --color=always {1} || git show --color=always {q}'

Close #1307

2018-06-10 01:40:22 +09:00

..

fzf-tmux.1

0.17.3

2017-12-03 23:55:24 +09:00

fzf.1

Improve preview window update events

2018-06-10 01:40:22 +09:00