The Debian package should propagate to the "testing" suite (stretch) in a few days.

This fixes fd's specified by a (single) digit.  The named fd syntax remains an XFail.

The default for [redirection] is 'none', so it wasn't actually being tested.

The important part of this change is removing the second conjunct from the
condition; the remainder of the change gives one example of when that matters.

Also fix an error in the title of the 0.4.0 section.

Merge remote-tracking branch 'danielsh/docs-highlighters.d-landing-page-v3'

* danielsh/docs-highlighters.d-landing-page-v3:
  docs: Restore (with changes) links removed in f5ca4b891b.
  docs: Followup to the recent docs branch: clean up some internal cross-references.
  docs: Clarify tagline summary of 'root' highlighter
  docs: Minor clarification.

Fixes zsh-users/zsh-syntax-highlighting#242.

The preceding commit, which made docs/highlighters.md and
highlighters/README.md distinct, allows reverting their removal.

The new text is from the preceding two commits, 22123ab622 + ded1c8789b.

Fixes a broken link.

Fixes zsh-users/zsh-syntax-highlighting#235.

* phy1729/doc-all:
  Remove broken links
  docs: Create all.md
  docs: Move docs into docs/
  docs: Remove duplicate 'How to activate it' sections
  docs: Move highlighter headers down one level

* danielsh/docs-copyedit-v1:
  docs copyedit: minor: Spelling/punctuation fix.
  docs copyedit: Rewrap to 80 columns, part 4.
  docs copyedit: Rewrap to 80 columns, part 3.
  docs copyedit: Rewrap to 80 columns, part 2.
  docs copyedit: Clarify tagline.
  docs copyedit: minor.
  docs copyedit: Review toplevel and tests README.md files.
  docs copyedit: Rewrap to 80 columns.
  docs copyedit: Restyle bold-italic to fixed-width.
  docs copyedit: Port 6d93ea07fd to the other highlighters' README's.
  docs copyedit: Whitespace.

Restore zsh URL removed a few commits ago.

In particular, tests were relying on the harness to provide a sandbox working
directory, but the perf harness wasn't providing that.

At this time, no user-visible consequences are known.