Fixes for defcustoms, prompted by cus-test-opts

* lisp/files.el (save-some-buffers-default-predicate):
* lisp/time.el (display-time-world-list):
* lisp/gnus/gnus-art.el (gnus-article-show-cursor):
* lisp/progmodes/cc-vars.el (c-noise-macro-with-parens-names):
* lisp/progmodes/verilog-mode.el (verilog-auto-wire-type):
* lisp/textmodes/less-css-mode.el (less-css-output-directory)
(less-css-output-file-name, less-css-input-file-name):
* lisp/vc/emerge.el (emerge-metachars):
* lisp/vc/vc-hg.el (vc-hg-symbolic-revision-styles):
Fix :types.
* lisp/net/newst-backend.el (newsticker-url-list-defaults): Fix url.

lisp/files.el

@@ -5195,7 +5195,9 @@ Before and after saving the buffer, this function runs
 This allows you to stop `save-some-buffers' from asking
 about certain files that you'd usually rather not save."
   :group 'auto-save
-  :type 'function
+  ;; FIXME nil should not be a valid option, let alone the default,
+  ;; eg so that add-function can be used.
+  :type '(choice (const :tag "Default" nil) function)
   :version "26.1")
 
 (defun save-some-buffers (&optional arg pred)

lisp/gnus/gnus-art.el

@@ -527,7 +527,7 @@ each invocation of the saving commands."
   "If non-nil, show the cursor in the Article buffer even when not selected."
   :version "25.1"
   :group 'gnus-article
-  :type 'bool)
+  :type 'boolean)
 
 (defcustom gnus-saved-headers gnus-visible-headers
   "Headers to keep if `gnus-save-all-headers' is nil.

lisp/net/newst-backend.el

@@ -162,7 +162,7 @@ value effective."
 
 (defcustom newsticker-url-list-defaults
  '(("Emacs Wiki"
-    "http://www.emacswiki.org/cgi-bin/wiki.pl?action=rss"
+    "https://www.emacswiki.org/emacs?action=rss"
     nil
     3600))
   "A customizable list of news feeds to select from.

lisp/progmodes/cc-vars.el

@@ -1669,7 +1669,7 @@ this implicitly by reinitializing C/C++/Objc Mode on any buffer)."
 which optionally have arguments in parentheses, and which expand to nothing.
 These are recognized by CC Mode only in declarations."
   :version "26.1"
-  :type '(regexp :tag "List of names (possibly empty)" string)
+  :type '(repeat :tag "List of names (possibly empty)" string)
   :group 'c)
 (put 'c-noise-macro-with-parens-names 'safe-local-variable #'c-string-list-p)
 

lisp/progmodes/verilog-mode.el

@@ -764,14 +764,14 @@ mode is experimental."
   :version "24.1"  ; rev670
   :group 'verilog-mode-actions
   :type 'boolean)
-(put 'verilog-auto-declare-nettype 'safe-local-variable `stringp)
+(put 'verilog-auto-declare-nettype 'safe-local-variable 'stringp)
 
 (defcustom verilog-auto-wire-comment t
   "Non-nil indicates to insert to/from comments with `verilog-auto-wire' etc."
   :version "25.1"
   :group 'verilog-mode-actions
   :type 'boolean)
-(put 'verilog-auto-wire-comment 'safe-local-variable `verilog-booleanp)
+(put 'verilog-auto-wire-comment 'safe-local-variable 'verilog-booleanp)
 
 (defcustom verilog-auto-wire-type nil
   "Non-nil specifies the data type to use with `verilog-auto-wire' etc.
@@ -781,8 +781,8 @@ this is generally only appropriate when making a non-SystemVerilog wrapper
 containing SystemVerilog cells."
   :version "24.1"  ; rev673
   :group 'verilog-mode-actions
-  :type 'string)
+  :type '(choice (const nil) string))
-(put 'verilog-auto-wire-type 'safe-local-variable `stringp)
+(put 'verilog-auto-wire-type 'safe-local-variable 'stringp)
 
 (defcustom verilog-auto-endcomments t
   "Non-nil means insert a comment /* ... */ after `end's.

lisp/textmodes/less-css-mode.el

@@ -106,7 +106,7 @@ Use \"-x\" to minify output."
 This path is expanded relative to the directory of the Less file
 using `expand-file-name', so both relative and absolute paths
 will work as expected."
-  :type 'directory)
+  :type '(choice (const :tag "Same as Less file" nil) directory))
 ;;;###autoload
 (put 'less-css-output-directory 'safe-local-variable 'stringp)
 
@@ -116,7 +116,7 @@ This can be also be set to a full path, or a relative path.  If
 the path is relative, it will be relative to the value of
 `less-css-output-dir', if set, or the current directory by
 default."
-  :type 'file)
+  :type '(choice (const :tag "Default" nil) file))
 (make-variable-buffer-local 'less-css-output-file-name)
 
 (defcustom less-css-input-file-name nil
@@ -132,7 +132,7 @@ variables.
 This can be also be set to a full path, or a relative path.  If
 the path is relative, it will be relative to the current
 directory by default."
-  :type 'file)
+  :type '(choice (const nil) file))
 ;;;###autoload
 (put 'less-css-input-file-name 'safe-local-variable 'stringp)
 (make-variable-buffer-local 'less-css-input-file-name)

lisp/time.el

@@ -173,7 +173,9 @@ If the value is t instead of an alist, use the value of
 `legacy-style-world-list' otherwise."
 
   :group 'display-time
-  :type '(repeat (list string string))
+  :type '(choice (const :tag "Default" t)
+                 (repeat :tag "List of zones and labels"
+                         (list (string :tag "Zone") (string :tag "Label"))))
   :version "23.1")
 
 (defun time--display-world-list ()

lisp/vc/emerge.el

@@ -3171,11 +3171,9 @@ See also `auto-save-file-name-p'."
       (setq limit (1+ (match-end 0)))))
   s)
 
-;; Metacharacters that have to be protected from the shell when executing
-;; a diff/diff3 command.
 (defcustom emerge-metachars nil
-  "Obsolete, emerge now uses `shell-quote-argument'."
+  "No longer used.  Emerge now uses `shell-quote-argument'."
-  :type 'regexp
+  :type '(choice (const nil) regexp)
   :group 'emerge)
 (make-obsolete-variable 'emerge-metachars nil "26.1")
 

lisp/vc/vc-hg.el

@@ -278,7 +278,7 @@ within the repository.
 
 If no list entry produces a useful revision, return `nil'."
   :type '(repeat (choice
-                  (const :tag "Active bookmark" 'bookmark)
+                  (const :tag "Active bookmark" builtin-active-bookmark)
                   (string :tag "Hg template")
                   (function :tag "Custom")))
   :version "26.1"