Hide wiki markup as part of markdown-toggle-markup-hiding

README.md

@@ -61,7 +61,7 @@ using `package.el`. First, configure `package.el` and the MELPA Stable
 repository by adding the following to your `.emacs`, `init.el`,
 or equivalent startup file:
 
-```lisp
+```emacs-lisp
 (require 'package)
 (add-to-list 'package-archives
              '("melpa-stable" . "https://stable.melpa.org/packages/"))
@@ -79,7 +79,7 @@ then you can automatically install and configure `markdown-mode` by
 adding a declaration such as this one to your init file (as an
 example; adjust settings as desired):
 
-```lisp
+```emacs-lisp
 (use-package markdown-mode
   :ensure t
   :mode ("README\\.md\\'" . gfm-mode)
@@ -99,7 +99,7 @@ save the file where Emacs can find it (i.e., a directory in your
 `load-path`). You can then configure `markdown-mode` and `gfm-mode`
 to load automatically by adding the following to your init file:
 
-```lisp
+```emacs-lisp
 (autoload 'markdown-mode "markdown-mode"
    "Major mode for editing Markdown files" t)
 (add-to-list 'auto-mode-alist
@@ -133,7 +133,7 @@ repository as above or install markdown-mode from
 If you clone the repository directly, then make sure that Emacs can
 find it by adding the following line to your startup file:
 
-```lisp
+```emacs-lisp
 (add-to-list 'load-path "/path/to/markdown-mode/repository")
 ```
 
@@ -350,7 +350,7 @@ prefix.  The most commonly used commands are described below.
     preview window to appear at the bottom or right, you can
     customize `markdown-split-window-direction`.
 
-      ```lisp
+      ```emacs-lisp
       ;; Set custom markdown preview function
       (setq markdown-live-preview-window-function #'my-markdown-preview-function)
 
@@ -952,18 +952,17 @@ customization screen.
 
 [Marked 2]: https://itunes.apple.com/us/app/marked-2/id890031187?mt=12&uo=4&at=11l5Vs&ct=mm
 
-## Extensions
-
+## Wiki Links Customization
 Besides supporting the basic Markdown syntax, Markdown Mode also
 includes syntax highlighting for `[[Wiki Links]]`.  This can be
 enabled by setting `markdown-enable-wiki-links` to a non-nil value.
-Wiki links may be followed by pressing <kbd>C-c C-o</kbd> when the point
-is at a wiki link.  Use <kbd>M-p</kbd> and <kbd>M-n</kbd> to quickly jump to the
-previous and next links (including links of other types).
+
 Aliased or piped wiki links of the form `[[link text|PageName]]`
-are also supported.  Since some wikis reverse these components, set
+are supported.  Since some wikis reverse these components, set
 `markdown-wiki-link-alias-first` to nil to treat them as
-`[[PageName|link text]]`.  If `markdown-wiki-link-fontify-missing`
+`[[PageName|link text]]`.
+
+If `markdown-wiki-link-fontify-missing`
 is also non-nil, Markdown Mode will highlight wiki links with
 missing target file in a different color.  By default, Markdown
 Mode only searches for target files in the current directory.
@@ -974,18 +973,31 @@ This value type is a symbol list. Possible values are
 - `parent-directories` : search in parent directories
 - `project` : search under project root
 
-[SmartyPants][] support is possible by customizing `markdown-command`.
+## Extensions
+### SmartyPants
+
+[SmartyPants][] is a free tool for easily translating plain ASCII punctuation
+characters into "smart" typographic punctuation HTML entities. It can perform
+the following transformations:
+- straight quotes ( " and ' ) into “curly” quote HTML entities
+- backticks-style quotes (``like this'') into “curly” quote HTML entities
+- dashes (“--” and “---”) into en- and em-dash entities
+- three consecutive dots (“...”) into an ellipsis entity
+
+SmartyPants support is possible by customizing `markdown-command`.
 If you install `SmartyPants.pl` at, say, `/usr/local/bin/smartypants`,
 then you can set `markdown-command` to `"markdown | smartypants"`.
 You can do this either by using <kbd>M-x customize-group markdown</kbd>
 or by placing the following in your `.emacs` file:
 
-```lisp
+```emacs-lisp
 (setq markdown-command "markdown | smartypants")
 ```
 
 [SmartyPants]: http://daringfireball.net/projects/smartypants/
 
+### LaTeX Mathematical Expressions
+
 Syntax highlighting for mathematical expressions written
 in LaTeX (only expressions denoted by `$..$`, `$$..$$`, or `\[..\]`)
 can be enabled by setting `markdown-enable-math` to a non-nil value,
@@ -1068,7 +1080,7 @@ by `markdown-mode` and `gfm-mode` as described below.
   for line wrapping in buffers.  You can do this with a
   `gfm-mode-hook` as follows:
 
-    ```lisp
+    ```emacs-lisp
     ;; Use visual-line-mode in gfm-mode
     (defun my-gfm-mode-hook ()
       (visual-line-mode 1))