fix links (#17)

Author: hegemonic

content/en/howto-commonjs-modules.md

@@ -250,7 +250,7 @@ module.exports = function ColorMixer() {
 ### String, number, or boolean assigned to 'module.exports'
 
 For value types (strings, numbers, and booleans) assigned to `module.exports`, you must document the
-exported value's type by using the [`@type` tag](type-tag) in the same JSDoc comment as the
+exported value's type by using the [`@type` tag][type-tag] in the same JSDoc comment as the
 `@module` tag:
 
 {% example "String assigned to module.exports" %}

content/en/plugins-markdown.md

@@ -98,7 +98,7 @@ The `githubRepoName` and `githubRepoOwner` indicate which GitHub repo should be
 ```
 {% endexample %}
 
-[gfm]: https://help.github.com/articles/github-flavored-markdown
+[gfm]: https://help.github.com/articles/github-flavored-markdown/
 
 ### Why two parsers?
 

howto-commonjs-modules.html

@@ -234,7 +234,7 @@ <h3 id="function-assigned-to-module-exports-">Function assigned to &#39;module.e
 </code></pre>
     </figure>
     <h3 id="string-number-or-boolean-assigned-to-module-exports-">String, number, or boolean assigned to &#39;module.exports&#39;</h3>
-    <p>For value types (strings, numbers, and booleans) assigned to <code>module.exports</code>, you must document the exported value&#39;s type by using the <a href="type-tag"><code>@type</code> tag</a>      in the same JSDoc comment as the
+    <p>For value types (strings, numbers, and booleans) assigned to <code>module.exports</code>, you must document the exported value&#39;s type by using the <a href="tags-type.html"><code>@type</code> tag</a>      in the same JSDoc comment as the
       <code>@module</code> tag:</p>
     <figure>
       <figcaption>String assigned to module.exports</figcaption><pre class="prettyprint lang-js"><code>/**

plugins-markdown.html

@@ -102,7 +102,7 @@ <h3 id="dominic-evilstreak-baggott-s-markdown-js">Dominic &quot;evilstreak&quot;
 </code></pre>
     </figure>
     <h3 id="github-flavored-markdown">GitHub Flavored Markdown</h3>
-    <p>The alternative parser is the modified Showdown parser supplied by GitHub for their <a href="https://help.github.com/articles/github-flavored-markdown">GitHub Flavored Markdown (GFM)</a>.
+    <p>The alternative parser is the modified Showdown parser supplied by GitHub for their <a href="https://help.github.com/articles/github-flavored-markdown/">GitHub Flavored Markdown (GFM)</a>.
       GFM provides several enhancements to standard Markdown syntax (see its documentation) intended to be useful to developers. It <em>also</em> has the ability
       to quickly link to GitHub repositories, files, and issues. It can be selected by setting the <code>parser</code> to <code>gfm</code> and supports three additional
       (and optional) configuration options.</p>