The API functions `command` and `command_options` (when `split_newline` = 0,
which is the default value) don't split on newline and then the first line is
executed and the subsequent lines (after "\n") are ignored.
There are no changes when the input has multiple lines filled by the user: the
split is done and multiple commands are executed (for example if the user is
pasting multiple commands to execute).
It seems no terminal return such codes any more for pgup/pgdn, and `meta-[I` is
conflicting with the xterm terminal "focus in" key code.
The keys are also removed from config when converting old keys, but only if
they are bound to the default command (`/window page_up` for `meta2-I` and
`/window page_down` for `meta2-G`).
When raw code and alias for a key are both matching, the raw code must always
have higher priority.
This commit fixes this behavior and gives priority to raw code.
Changes:
- add function gui_key_debug_print_key
- change message "no key" by "no key binding"
- remove messages ""insert into input" / "ignored"
- add color for delimiters
Sébastien Helleu