* test/lisp/erc/erc-match-tests.el (erc-add-entry-to-list): The local
macro `skip-when' first appeared in Emacs 30, but ERC supports Emacs 27+
and runs its test suite on all supported versions.
* test/lisp/erc/erc-scenarios-keep-place-indicator.el
(erc-scenarios-keep-place-indicator--follow): Temporarily tag as
:unstable in all CI environments.
* doc/misc/erc.texi (Sample Configuration): Remove `erc-modules' from
the `:custom' section of the `use-package' declaration for feature `erc'
because its presence there depends on `:defer' being non-nil, and this
configuration is supposed to be `:defer' agnostic. This reverts part of
3f1ce47f "; Add face customization to ERC's sample config".
* etc/ERC-NEWS: Mention `erc-modules' no longer being autoloaded.
* lisp/erc/erc-match.el (erc-text-matched-hooks): Explain expected
format of non-NUH matches.
* test/lisp/erc/erc-match-tests.el (test/lisp/erc/erc-match-tests.el):
Inhibit messages when running non-interactively.
* lisp/erc/erc-match.el (erc-pal-highlight-type)
(erc-fool-highlight-type, erc-dangerous-host-highlight-type): Clarify
some areas in doc strings.
* test/lisp/erc/erc-match-tests.el: Require `erc-test-common' library.
(erc-match-tests--assert-face-absent)
(erc-match-tests--assert-face-present)
(erc-match-tests--assert-speaker-highlighted)
(erc-match-tests--assert-speaker-only-highlighted)
(erc-match-tests--perform)
(erc-match-tests--hl-type-nick): New functions.
(erc-match-message/pal/nick, erc-match-message/fool/nick)
(erc-match-message/dangerous-host/nick): New tests.
(erc-match-tests--hl-type-message): New function.
(erc-match-message/pal/message)
(erc-match-message/fool/message)
(erc-match-message/dangerous-host/message): New tests.
(erc-match-tests--hl-type-all): New function.
(erc-match-message/pal/all, erc-match-message/fool/all)
(erc-match-message/dangerous-host/all): New tests.
(erc-match-tests--hl-type-nick-or-keyword): New function.
(erc-match-message/current-nick/nick-or-keyword): New test.
(erc-match-tests--hl-type-keyword): New function.
(erc-match-message/keyword/keyword): New test.
(erc-match-tests--log-matches): New function.
(erc-log-matches): New test.
* test/lisp/erc/resources/erc-tests-common.el: Require `erc-d-i'.
(erc-tests-common-add-cmem, erc-tests-common-parse-line)
(erc-tests-common-simulate-line)
(erc-tests-common-simulate-privmsg): New functions.
* lisp/erc/erc-match.el (erc-match-quote-when-adding) Add new option
to quote new items added to match lists.
(erc-add-entry-to-list): Add optional `alt' parameter indicating
whether to flip the behavior indicated by
`erc-match-quote-when-adding'.
(erc-add-pal, erc-add-fool, erc-add-keyword, erc-add-dangerous-host):
Pass universal arg to `erc-add-entry-to-list' as `alt' argument.
(erc-match-pal-p, erc-match-fool-p, erc-match-keyword-p,
erc-match-dangerous-host-p): Don't bother matching when list is nil.
* lisp/erc/erc.el (erc-list-match (lst str): Join input list as regexp
union instead of looping over items.
* etc/ERC-NEWS: Update misc-UX section for 5.5.
* test/lisp/erc/erc-match-tests.el: New file. (Bug#56450)
