We already call it that way internally.

Most plugins are not used anymore; some (eg. pathogen) have been
replaced by native Vim features, some will be replaced using new Vim's
plugin system.

On Fedora, commonmark is from nodejs-commonmark, which is long-term
broken.

Not using devel anymore; master will suffice.

If BASHUM_CTXSYM is set, show it in a different color.  This is intended
for special-purpose Bash invocations with modified environment, for example
when authentication to some remote service has been pre-set.

Checking on sorted versions of these files, it looks like x-t just added
couple of new config keys.

"activation" is eg. when opening new tab/window using CLI and a
window-managing app such as Firefox.

This has been bugging me for ages with qutebrowser, which (possibly by
bug) activates previous window even in non-tab mode, preventing new
window to appear in intuitive order within current container.

Make it easier to realize which window raised it.