Useful when using, e.g., Debian's package, which outputs just "Debian" here.

Context: zsh-users/zsh-docker#2

Note that there will be no zsh 5.3.2; zsh 5.3.1 will be followed
by 5.4.  There might be 5.4-test-1 pre-releases, though.

* upstream/pr/433:
  driver: Improve comment about ^r pattern match bug
  driver: Adjust zsh version for probing for pattern match bug
  README: Fix FAQ entry about isearch highlighting

The bug is not specific to 5.3.1.

Fixes #423

Fixes #439.

Fixes #426.

Review-by: Matthew Martin, me

Merge remote-tracking branch 'upstream/pr/415'

* upstream/pr/415:
  workaround for PAT_STATIC bug in zsh

Also 'then'/'elif'/'else'.

Fixes #409.

ZSH versions less than 5.3.2 (or 5.4) have a bug that prevents
`history-incremental-pattern-search-backward` for working
correctly (the history stops searching after the first found item).

Closes #407

Fixes #400.

The latest version of zplug has deprecated the `nice` tag. The `defer` tag is the preferred method now.

Merge remote-tracking branch 'upstream/pr/395'

* upstream/pr/395:
  tests: Add a regression test for issue #392 (aliases beginning with a '+' are lost).
  tests: Move some code in preparation for next commit. No functional change.
  driver: Don't undefine aliases that begin with a '+', to workaround an upstream bug.

Fixes #392.

The upstream repository has been split and renamed.

Fixes #391.

Fixes #390.

Merge remote-tracking branch 'upstream/pr/385'

* upstream/pr/385:
  'main': Add regression test for previous commit.
  'main': Fix bug: no start_pos=$end_pos in comment short path

Fixes #385.

Such a command word would, if not valid, fall through to the `type -w` case,
where the output would be misparsed, consequently the forward-compatible [arg0]
style would be used.