- update to 3.2:
* status-fg and status-bg are now applied before status-style rather than instead
of; this means that if either is set to default the status-style colour will be
used. To fix, replace status-bg default with status-style bg=default.
* How data is sent to control mode clients has been completely revamped to both
be more fair with multiple panes and to prevent huge amounts of data being
backed up; this feature is used by default when tmux is attached with the
latest iTerm2 nightly builds.
* Configuration file parsing has changed slightly: the contents of the new {}
syntax introduced in 3.1 must now be valid tmux command syntax; and to allow
formats to be annotated, strings given with quotes may now contain newlines
(leading spaces and comments are stripped).
* A new customize mode available with C-b C (C-b S-c) which allows options and
key bindings to be browsed and changed interactively.
* Support for extended keys offered by some terminals (xterm, mintty, iTerm2),
see https://github.com/tmux/tmux/wiki/Modifier-Keys#extended-keys.
* A pane-border-lines option to change the characters used to draw the pane
border separators.
* How UTF-8 data is stored has been rewritten to reduce memory use for characters
in the BMP.
* The message log (C-b ~) has been changed to be per server instead of per client
and to have some useful content.
* Client flags have been extended (refresh-client -F becomes -f and also added
for attach-session and new-session), and a read-only flag added (same as -r to
attach-session).
* A new active-pane client flag that if given allows a client to have its own
active pane for each window rather than being tied to the server's active pane.
* Improved command-prompt completion including showing a menu of completions.
* All style options can now be formats, for example the default
pane-active-border-style now changes colour depending on pane_in_mode and