Backport commit f9111d878 from Emacs

* lisp/oc-basic.el (org-cite-basic-sorting-field)
(org-cite-basic-author-year-separator)
(org-cite-basic-max-key-distance)
(org-cite-basic-author-column-end)
(org-cite-basic-column-separator)
(org-cite-basic-mouse-over-key-face):
* lisp/oc-biblatex.el (org-cite-biblatex-options):
* lisp/oc-csl.el (org-cite-csl-link-cites)
(org-cite-csl-html-hanging-indent)
(org-cite-csl-html-label-width-per-char)
(org-cite-csl-latex-hanging-indent):
* lisp/oc.el (org-cite-adjust-note-numbers):
* lisp/org-keys.el (org-return-follows-link):
* lisp/org.el (org-fontify-todo-headline):
* lisp/ox-html.el (org-html-equation-reference-format)
(org-html-wrap-src-lines):
* lisp/ox-latex.el (org-latex-reference-command)
(org-latex-default-quote-environment): Fix :safe property.

The safe-local-variable property is a function (bug#50944)
f9111d8784bf12263abbe127cdfcbe5f409c9b3b
Glenn Morris
Sat Oct 2 10:37:42 2021 -0700

lisp/oc-basic.el

@@ -89,42 +89,42 @@
   :group 'org-cite
   :package-version '(Org . "9.5")
   :type 'symbol
-  :safe t)
+  :safe #'symbolp)
 
 (defcustom org-cite-basic-author-year-separator ", "
   "String used to separate cites in an author-year configuration."
   :group 'org-cite
   :package-version '(Org . "9.5")
   :type 'string
-  :safe t)
+  :safe #'stringp)
 
 (defcustom org-cite-basic-max-key-distance 2
   "Maximum (Levenshtein) distance between a wrong key and its suggestions."
   :group 'org-cite
   :package-version '(Org . "9.5")
   :type 'integer
-  :safe t)
+  :safe #'integerp)
 
 (defcustom org-cite-basic-author-column-end 25
   "Column where author field ends in completion table, as an integer."
   :group 'org-cite
   :package-version '(Org . "9.5")
   :type 'integer
-  :safe t)
+  :safe #'integerp)
 
 (defcustom org-cite-basic-column-separator "  "
   "Column separator in completion table, as a string."
   :group 'org-cite
   :package-version '(Org . "9.5")
   :type 'string
-  :safe t)
+  :safe #'stringp)
 
 (defcustom org-cite-basic-mouse-over-key-face 'highlight
   "Face used when mouse is over a citation key."
   :group 'org-cite
   :package-version '(Org . "9.5")
   :type 'face
-  :safe t)
+  :safe #'facep)
 
 
 ;;; Internal variables

lisp/oc-biblatex.el

@@ -80,7 +80,7 @@ If \"biblatex\" package is already required in the document, e.g., through
   :type '(choice
           (string :tag "Options (key=value,key2=value2...)")
           (const :tag "No option" nil))
-  :safe t)
+  :safe #'string-or-null-p)
 
 
 ;;; Internal functions

lisp/oc-csl.el

@@ -146,7 +146,7 @@ directory.  This variable is ignored when style file is absolute."
   :group 'org-cite
   :package-version '(Org . "9.5")
   :type 'boolean
-  :safe t)
+  :safe #'booleanp)
 
 (defcustom org-cite-csl-no-citelinks-backends '(ascii)
   "List of export back-ends for which cite linking is disabled.
@@ -163,7 +163,7 @@ is also disabled."
   :group 'org-cite
   :package-version '(Org . "9.5")
   :type 'string
-  :safe t)
+  :safe #'stringp)
 
 (defcustom org-cite-csl-html-label-width-per-char "0.6em"
   "Character width in CSS units for calculating entry label widths.
@@ -171,14 +171,14 @@ Used only when `second-field-align' is activated by the used CSL style."
   :group 'org-cite
   :package-version '(Org . "9.5")
   :type 'string
-  :safe t)
+  :safe #'stringp)
 
 (defcustom org-cite-csl-latex-hanging-indent "1.5em"
   "Size of hanging-indent for LaTeX output in valid LaTeX units."
   :group 'org-cite
   :package-version '(Org . "9.5")
   :type 'string
-  :safe t)
+  :safe #'stringp)
 
 
 ;;; Internal variables

lisp/oc.el

@@ -234,7 +234,7 @@ When nil, the note number is not moved."
   :package-version '(Org . "9.5")
   :type '(choice (const :tag "Automatic note number location" t)
                  (const :tag "Place note numbers manually" nil))
-  :safe t)
+  :safe #'booleanp)
 
 (defcustom org-cite-note-rules
   '(("en-us" inside outside after)

lisp/org-keys.el

@@ -300,7 +300,7 @@ implementation is bad."
 In tables, the special behavior of RET has precedence."
   :group 'org-link-follow
   :type 'boolean
-  :safe t)
+  :safe #'booleanp)
 
 
 ;;; Functions

lisp/org.el

@@ -3630,7 +3630,7 @@ When this is non-nil, the headline after the keyword is set to the
   :group 'org-appearance
   :package-version '(Org . "9.4")
   :type 'boolean
-  :safe t)
+  :safe #'booleanp)
 
 (defcustom org-fontify-done-headline t
   "Non-nil means change the face of a headline if it is marked DONE.

lisp/ox-html.el

@@ -795,7 +795,7 @@ Most common values are:
   :group 'org-export-html
   :package-version '(Org . "9.4")
   :type 'string
-  :safe t)
+  :safe #'stringp)
 
 (defcustom org-html-with-latex org-export-with-latex
   "Non-nil means process LaTeX math snippets.
@@ -903,7 +903,7 @@ numbers are enabled."
   :group 'org-export-html
   :package-version '(Org . "9.3")
   :type 'boolean
-  :safe t)
+  :safe #'booleanp)
 
 ;;;; Table
 

lisp/ox-latex.el

@@ -413,7 +413,7 @@ to \"\\autoref{%s}\" or \"\\cref{%s}\" for example."
   :group 'org-export-latex
   :type 'string
   :package-version '(Org . "9.5")
-  :safe t)
+  :safe #'stringp)
 
 ;;;; Preamble
 
@@ -793,7 +793,7 @@ default we use here encompasses both."
   :group 'org-export-latex
   :package-version '(Org . "9.5")
   :type 'string
-  :safe t)
+  :safe #'stringp)
 
 (defcustom org-latex-default-table-mode 'table
   "Default mode for tables.