New shortdoc functions use Unicode arrows when possible, which caused
some tests to fail if run under such circumstances.
* test/lisp/emacs-lisp/shortdoc-tests.el
(shortdoc-tests--to-ascii): New function.
(shortdoc-function-examples-test)
(shortdoc-help-fns-examples-function-test): Call it.
* lisp/emacs-lisp/shortdoc.el (shortdoc-help-fns-examples-function):
Implement a better logic to pluralize "Example", by counting the
number of arrow characters in the example string. (Bug#61877)
* test/lisp/emacs-lisp/shortdoc-tests.el
(shortdoc-help-fns-examples-function-test): Add a test.
* lisp/emacs-lisp/shortdoc.el (shortdoc--display-function): Add
a new shortdoc-example text property so that ELisp examples can
be searched for later.
(shortdoc--insert-group-in-buffer): New function extracted from
the buffer insertion code in 'shortdoc-display-group'.
(shortdoc-display-group): Implement in terms of
'shortdoc--insert-group-in-buffer'.
(shortdoc-function-examples): New function that returns an alist
of Emacs Lisp examples from shortdoc.
(shortdoc-help-fns-examples-function): New function to insert
Emacs Lisp function examples in *Help* buffers, if added to
'help-fns-describe-function-functions'.
*
test/lisp/emacs-lisp/shortdoc-tests.el (shortdoc-function-examples-test):
Test it.
* doc/emacs/help.texi (Name Help): Document in the user manual.
* doc/lispref/help.texi (Documentation Groups): Document it.
* etc/NEWS: Advertise it. (Bug#61877)
* test/lisp/emacs-lisp/shortdoc-tests.el (regexp-opt): Require.
`regexp-opt-charset` is not autoloaded, and whether `regexp-opt` is
preloaded is configuration-dependent.
* lisp/emacs-lisp/shortdoc.el (shortdoc-add-function): Use nconc to
actually append a new section to the list of groups while avoiding a
previous OBOE. Push a new group to the front of shortdoc--groups
without copying it, just like define-short-documentation-group does.
(buffer): Fix copypasta in unlock-buffer example.
* test/lisp/emacs-lisp/shortdoc-tests.el (shortdoc-examples): Also
check that :no-value forms demonstrate the right function.
* doc/lispref/help.texi (Documentation Groups): Clarify that @dots
in the define-short-documentation-group arglist refer to whole
key-value pairs. Fix typo in :eg-result-string description.
Make sure that each example in shortdoc actually contains the function
it illustrates, and add a test for it.
* lisp/emacs-lisp/shortdoc.el (string, list, buffer, number):
Use the right functions in examples for string-version-lessp,
lax-plist-put, point-min and ffloor.
* test/lisp/emacs-lisp/shortdoc-tests.el: New test file.
