Using a dummy command that works as the barrier.

Fix #702

Close #699

Fixes #643
Doesn't break #648

This reverts commit 4d444777.

Avoids confusing grouped sessions.
Fixes #643

For consistency and (negligible) performance improvement

e.g. fzf-tmux -q '$PATH'

Related: #343

Close #583

This reverts commit f074709f.

Close #586. /cc @akashin

Patch submitted by @netei. Close #524.

Related: https://github.com/junegunn/fzf.vim/issues/67

Fix #305. ncurses can crash on invalid $TERM. fzf-tmux uses bash on
a new pane so we have to make sure that the $TERM is consistent with
that of the hosting shell.

Close #303

This reverts commit 7b6a27cb.

The default shell can be a non-standard shell (e.g. fish)

Related #199

See: #181

- fzf-tmux
- CTRL-T of bash/zsh/fish
    - fish implementation may not work if the path contains
      double-quote characters (FIXME)