As of Homebrew 4.6.12, command-not-found is built into Homebrew core and
the tap is deprecated, causing Homebrew to print deprecation warnings on
init until the tap is uninstalled, after which prezto can't find the
helper in its new location.
* Added logic to look first in the new location for handler.sh in the
core Homebrew repository, *then* check in Taps.
* Added an OSTYPE check for MacOS to prevent this from accidentally
engaging on Linux systems using Homebrew as a third party package
manager
Zsh and Prezto files don't always reside in `~/`. Instead, they have
a more spec compliant location (`${ZDOTDIR:-$HOME}/`). Make them
unambiguous in the documentation. Likewise, for `$GNUPGHOME`.
Further, add instruction for optionally setting up Prezto in
`$XDG_CONFIG_HOME`.
While at this, also add clarification on relative ordering of some of
the modules, apply more formatting tweaks and doc improvements.
General purpose reformating and rewording in (a few places). This should
also make markdown linting happier.
Prefer back-ticks wherever useful and use `console` for code blocks to
be executed on terminal.
Also, update references links wherever possible (including update from
'http://' to 'https://').
