Prefer defcustom :local specifier in textmodes

* lisp/textmodes/fill.el (default-justification):
* lisp/textmodes/ispell.el (ispell-local-dictionary)
(ispell-skip-html):
* lisp/textmodes/less-css-mode.el (less-css-output-file-name)
(less-css-input-file-name):
* lisp/textmodes/refer.el (refer-bib-directory, refer-bib-files)
(refer-cache-bib-files):
* lisp/textmodes/two-column.el (2C-separator, 2C-window-width):
Prefer defcustom :local specifier to using 'make-variable-buffer-local'
directly.

lisp/textmodes/fill.el

@@ -1116,8 +1116,8 @@ The `justification' text-property can locally override this variable."
 		 (const full)
 		 (const center)
                  (const none))
+  :local t
   :safe 'symbolp)
-(make-variable-buffer-local 'default-justification)
 
 (defun current-justification ()
   "How should we justify this line?

lisp/textmodes/ispell.el

@@ -346,12 +346,11 @@ calling \\[ispell-change-dictionary] with that value.  This variable
 is automatically set when defined in the file with either
 `ispell-dictionary-keyword' or the Local Variable syntax."
   :type '(choice string
-                 (const :tag "default" nil)))
+                 (const :tag "default" nil))
+  :local t)
 ;;;###autoload
 (put 'ispell-local-dictionary 'safe-local-variable 'string-or-null-p)
 
-(make-variable-buffer-local 'ispell-local-dictionary)
-
 (defcustom ispell-dictionary nil
   "Default dictionary to use if `ispell-local-dictionary' is nil."
   :type '(choice string
@@ -377,10 +376,8 @@ such as \"&\".  See `ispell-html-skip-alists' for more details.
 
 This variable affects spell-checking of HTML, XML, and SGML files."
   :type '(choice (const :tag "always" t) (const :tag "never" nil)
-                 (const :tag "use-mode-name" use-mode-name)))
-
-(make-variable-buffer-local 'ispell-skip-html)
-
+                 (const :tag "use-mode-name" use-mode-name))
+  :local t)
 
 (defcustom ispell-local-dictionary-alist nil
   "List of local or customized dictionary definitions.

lisp/textmodes/less-css-mode.el

@@ -115,8 +115,8 @@ 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 '(choice (const :tag "Default" nil) file))
-(make-variable-buffer-local 'less-css-output-file-name)
+  :type '(choice (const :tag "Default" nil) file)
+  :local t)
 
 (defcustom less-css-input-file-name nil
   "File name which will be compiled to CSS.
@@ -131,10 +131,10 @@ 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 '(choice (const nil) file))
+  :type '(choice (const nil) file)
+  :local t)
 ;;;###autoload
 (put 'less-css-input-file-name 'safe-local-variable #'stringp)
-(make-variable-buffer-local 'less-css-input-file-name)
 
 (defconst less-css-default-error-regex
   "^\\(?:\e\\[31m\\)?\\([^\e\n]*\\|FileError:.*\n\\)\\(?:\e\\[39m\e\\[31m\\)? in \\(?:\e\\[39m\\)?\\([^ \r\n\t\e]+\\)\\(?:\e\\[90m\\)?\\(?::\\| on line \\)\\([0-9]+\\)\\(?::\\|, column \\)\\([0-9]+\\):?\\(?:\e\\[39m\\)?")

lisp/textmodes/refer.el

@@ -91,7 +91,8 @@ the default search path.  Since Refer does not know that default path,
 it cannot search it.  Include that path explicitly in your BIBINPUTS
 environment if you really want it searched (which is not likely to
 happen anyway)."
-  :type '(choice (repeat directory) (const bibinputs) (const texinputs)))
+  :type '(choice (repeat directory) (const bibinputs) (const texinputs))
+  :local t)
 
 (defcustom refer-bib-files 'dir
   "List of \\.bib files to search for references,
@@ -109,14 +110,16 @@ If `refer-bib-files' is nil, auto or dir, it is setq'd to the appropriate
 list of files when it is first used if `refer-cache-bib-files' is t.  If
 `refer-cache-bib-files' is nil, the list of \\.bib files to use is re-read
 each time it is needed."
-  :type '(choice (repeat file) (const nil) (const auto) (const dir)))
+  :type '(choice (repeat file) (const nil) (const auto) (const dir))
+  :local t)
 
 (defcustom refer-cache-bib-files t
   "Variable determining whether the value of `refer-bib-files' should be cached.
 If t, initialize the value of refer-bib-files the first time it is used.
 If nil, re-read the list of \\.bib files depending on the value of
 `refer-bib-files' each time it is needed."
-  :type 'boolean)
+  :type 'boolean
+  :local t)
 
 (defcustom refer-bib-files-regexp "\\\\bibliography"
   "Regexp matching a bibliography file declaration.
@@ -130,10 +133,6 @@ If a specified file doesn't exist and has no extension, a \\.bib extension
 is automatically tried."
   :type 'regexp)
 
-(make-variable-buffer-local 'refer-bib-files)
-(make-variable-buffer-local 'refer-cache-bib-files)
-(make-variable-buffer-local 'refer-bib-directory)
-
 ;;; Internal variables
 (defvar refer-saved-state nil)
 (defvar refer-previous-keywords nil)

lisp/textmodes/two-column.el

@@ -142,15 +142,14 @@
 (defcustom 2C-separator ""
   "A string inserted between the two columns when merging.
 This gets set locally by \\[2C-split]."
-  :type 'string)
-(put '2C-separator 'permanent-local t)
+  :type 'string
+  :local 'permanent-only)
 
 (defcustom 2C-window-width 40
   "The width of the first column.  (Must be at least `window-min-width'.)
 This value is local for every buffer that sets it."
-  :type 'integer)
-(make-variable-buffer-local '2C-window-width)
-(put '2C-window-width 'permanent-local t)
+  :type 'integer
+  :local 'permanent)
 
 (defcustom 2C-beyond-fill-column 4
   "Base for calculating `fill-column' for a buffer in two-column minor mode.