Fix #'fun handling inside `labels' (Bug#31792)

* lisp/emacs-lisp/cl.el (labels): Apply the equivalent of the
cl-labels change from 2015-01-16 "* lisp/emacs-lisp/cl-macs.el: Fix
last change".
* test/lisp/emacs-lisp/cl-tests.el (labels-function-quoting): New
test.
* lisp/emacs-lisp/cl-macs.el (cl-flet, cl-labels): Improve docstring,
link to relevant manual page.
* doc/misc/cl.texi (Function Bindings): Don't imply that function
cells of symbols are modified by cl-flet.  Don't claim that cl-flet or
cl-labels affect references of the form (quote FUNC).

1 files changed, 35 insertions, 0 deletions

diff --git a/test/lisp/emacs-lisp/cl-tests.el b/test/lisp/emacs-lisp/cl-tests.el
new file mode 100644
index 00000000000..b673822cd9a
--- /dev/null
+++ b/test/lisp/emacs-lisp/cl-tests.el
@@ -0,0 +1,35 @@
+;;; cl-tests.el --- tests for emacs-lisp/cl.el  -*- lexical-binding:t -*-
+
+;; Copyright (C) 2018 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; This program is free software: you can redistribute it and/or
+;; modify it under the terms of the GNU General Public License as
+;; published by the Free Software Foundation, either version 3 of the
+;; License, or (at your option) any later version.
+;;
+;; This program is distributed in the hope that it will be useful, but
+;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;; General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see `https://www.gnu.org/licenses/'.
+
+;;; Commentary:
+
+;;; Code:
+
+(require 'cl)
+(require 'ert)
+
+
+
+(ert-deftest labels-function-quoting ()
+  "Test that #'foo does the right thing in `labels'." ; Bug#31792.
+  (should (eq (funcall (labels ((foo () t))
+                         #'foo))
+              t)))
+
+;;; cl-tests.el ends here