Make list-commands command show only one command if an argument is
given, from Ilya Grigoriev in GitHub issue 4352.

Support -1 without -N for list-keys.

Add args parsing callback for some future work, currently unused.

Hide struct args behind a couple of accessor functions.

Remove stray spaces after function names.

Include modifiers when looking up an individual key.

Add a flag to disable keys to close a message, GitHub issue 2625.

Add a -d option to display-message to set delay, from theonekeyg at
gmail dot com in GitHub issue 2322.

Always send xterm-style keys for M-Left and M-Right. GitHub issue 2296.

Separate key flags and modifiers, log key flags, make the "xterm" flag
more explicit and fix M- keys with a leading escape.

Add a customize mode where keys and options may be browsed and changed,
includes adding a brief description of each option. Bound to "C" by
default.

Support embedded styles in the display-message message, GitHub issue
2206.

Make client -c and -t handling common in cmd-queue.c and try to be
clearer about whether the client is the target client (must have a
session) or not.

Also move cmdq_item and cmdq_list into cmd-queue.c (this is to make its
use more clearly defined and preparation for some future work).

Make struct cmd local to cmd.c and move it out of tmux.h.

A couple of other redundant checks/assignments.

Add an argument to list-commands to show only a single command.

Add -a to list-keys to also list keys without notes with -N, suggested
by Shehu Dikko.

Add support for adding a note to a key binding (with bind-key -N) and
use this to add descriptions to the default key bindings. A new -N flag
to list-keys shows key bindings with notes rather than th

Add support for adding a note to a key binding (with bind-key -N) and
use this to add descriptions to the default key bindings. A new -N flag
to list-keys shows key bindings with notes rather than the default
bind-key command used to create them. Change the default ? binding to
use this to show a readable summary of keys.

Also extend command-prompt to return the name of the key pressed and add
a default binding (/) to show the note for the next key pressed

Suggested by Alex Tremblay in GitHub issue 2000.

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Some old tmux versions can sometimes generate layout strings which have
the incorrect size for the top cell. Previously tmux didn't care but now
that panes can be partly hidden, the size matters and

Some old tmux versions can sometimes generate layout strings which have
the incorrect size for the top cell. Previously tmux didn't care but now
that panes can be partly hidden, the size matters and is checked more
strictly. So add some code to fix up the most common problem and a
sanity check to reject layouts with any other size problems. Reported by
Aleksandrs Ledovskis in GitHub issue 1930.

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Use a malloc'd buffer for lsk since commands can be very long, from Gregory Pakosz.

Do not lazily use BUFSIZ for "I don't care what size" when building
strings because it is only guaranteed to be 256 bytes and even the
default 1024 is not always enough. Reported by Gregory Pakosz.

Break the argument escaping code into a separate function and use it to
escape key bindings in list-keys. Also escape ~ and ; and $ properly.

Make key trees and some other bits static.

In order that people can use formats like #D in #() in the status line
and not have to wait for an update when they change pane, we allow
commands to run more than once a second if the expanded form

In order that people can use formats like #D in #() in the status line
and not have to wait for an update when they change pane, we allow
commands to run more than once a second if the expanded form
changes. Unfortunately this can mean them being run far too often
(pretty much continually) when multiple clients exist, because some
formats (including #D) will always differ between clients.

To avoid this, give each client its own tree of jobs which means that
the same command will be different instances for each client - similar
to how we have the tag to separate commands for different panes.

GitHub issue 889; test case reported by Paul Johnson.

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