fix broken links in documentation

docs/_docs/deployment-methods.md

@@ -168,7 +168,7 @@ script executes.
 
 [Rack-Jekyll](https://github.com/adaoraul/rack-jekyll/) is an easy way to deploy your site on any Rack server such as Amazon EC2, Slicehost, Heroku, and so forth. It also can run with [shotgun](https://github.com/rtomayko/shotgun/), [rackup](https://github.com/rack/rack), [mongrel](https://github.com/mongrel/mongrel), [unicorn](https://github.com/defunkt/unicorn/), and [others](https://github.com/adaoraul/rack-jekyll#readme).
 
-Read [this post](http://andycroll.com/ruby/serving-a-jekyll-blog-using-heroku) on how to deploy to Heroku using Rack-Jekyll.
+Read [this post](http://andycroll.com/ruby/serving-a-jekyll-blog-using-heroku/) on how to deploy to Heroku using Rack-Jekyll.
 
 ## Jekyll-Admin for Rails
 
@@ -207,4 +207,3 @@ Setting up Kickster is very easy, just install the gem and you are good to go. M
 [Aerobatic](https://www.aerobatic.com) is an add-on for Bitbucket that brings GitHub Pages style functionality to Bitbucket users. It includes continuous deployment, custom domains with a wildcard SSL cert, CDN, basic auth, and staging branches all in the box.
 
 Automating the build and deployment of a Jekyll site is just as simple as GitHub Pages - push your changes to your repo (excluding the `_site` directory) and within seconds a build will be triggered and your built site deployed to our highly- available, globally distributed hosting service. The build process will even install and execute custom Ruby plugins. See our [Jekyll docs](https://www.aerobatic.com/docs/static-generators#jekyll) for more details.
-

docs/_docs/extras.md

@@ -15,7 +15,7 @@ Kramdown comes with optional support for LaTeX to PNG rendering via [MathJax](ht
 <script src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML" type="text/javascript"></script>
 ```
 
-For more information about getting started, check out [this excellent blog post](http://gastonsanchez.com/opinion/2014/02/16/Mathjax-with-jekyll/).
+For more information about getting started, check out [this excellent blog post](http://gastonsanchez.com/visually-enforced/opinion/2014/02/16/Mathjax-with-jekyll/).
 
 ## Alternative Markdown Processors
 

docs/_docs/github-pages.md

@@ -12,15 +12,13 @@ content, they’re also a great way to host your Jekyll-powered website for free
 
 Never built a website with GitHub Pages before? [See this marvelous guide by
 Jonathan McGlone to get you up and running](http://jmcglone.com/guides/github-pages/).
-This guide will teach you what you need to know about Git, GitHub, and Jekyll to
-create your very own website on GitHub Pages.
+This guide will teach you what you need to know about Git, GitHub, and Jekyll to create your very own website on GitHub Pages.
 
 ### Project Page URL Structure
 
 Sometimes it's nice to preview your Jekyll site before you push your `gh-pages`
 branch to GitHub. However, the subdirectory-like URL structure GitHub uses for
-Project Pages complicates the proper resolution of URLs. In order to assure your
-site builds properly, use `site.github.url` in your URL's.
+Project Pages complicates the proper resolution of URLs. In order to assure your site builds properly, use `site.github.url` in your URL's.
 
 ```html
 {% raw %}
@@ -91,7 +89,7 @@ gem 'github-pages'
 And be sure to run `bundle update` often.
 
 If you like to install `pages-gem` on Windows you can find instructions by Jens Willmer on
-[how to install github-pages gem on Windows (x64)]("https://jwillmer.de/blog/tutorial/how-to-install-jekyll-and-pages-gem-on-windows-10-x46#github-pages-and-plugins").
+[how to install github-pages gem on Windows (x64)](https://jwillmer.de/blog/tutorial/how-to-install-jekyll-and-pages-gem-on-windows-10-x46#github-pages-and-plugins).
 </div>
 
 <div class="note info">

docs/_docs/permalinks.md

@@ -328,7 +328,7 @@ As with posts, if you use a permalink style that omits the `.html` file extensio
 
 By default, collections follow a similar structure in the `_site` folder as pages, except that the path is prefaced by the collection name. For example: `collectionname/mypage.html`. For permalink settings that omit the file extension, the path would be `collection_name/mypage/index.html`.
 
-Collections have their own way of setting permalinks. Additionally, collections have unique template variables available available (such as `path` and `output_ext`). See the [Configuring permalinks for collections]( ../collections#permalinks ) in Collections for more information.
+Collections have their own way of setting permalinks. Additionally, collections have unique template variables available available (such as `path` and `output_ext`). See the [Configuring permalinks for collections](../collections/#permalinks) in Collections for more information.
 
 ## Flattening pages in \_site on build
 

docs/_docs/quickstart.md

@@ -4,7 +4,7 @@ title: Quick-start guide
 permalink: /docs/quickstart/
 ---
 
-If you already have [Ruby](https://www.ruby-lang.org/en/downloads/) and [RubyGems](https://rubygems.org/pages/download) installed (see Jekyll's [requirements](/docs/installation/#requirements/)), you can create a new Jekyll site by doing the following:
+If you already have [Ruby](https://www.ruby-lang.org/en/downloads/) and [RubyGems](https://rubygems.org/pages/download) installed (see Jekyll's [requirements](../installation/#requirements)), you can create a new Jekyll site by doing the following:
 
 ```sh
 # Install Jekyll and Bundler gems through RubyGems

docs/_docs/windows.md

@@ -17,6 +17,7 @@ A quick way to install Jekyll is to follow the [installation instructions by Dav
  3. Reopen a command prompt and install Jekyll: `gem install jekyll`
 
 Updates in the infrastructure of Ruby may cause SSL errors when attempting to use `gem install` with versions of the RubyGems package older than 2.6. (The RubyGems package installed via the Chocolatey tool is version 2.3) If you have installed an older version, you can update the RubyGems package using the directions [here.][ssl-certificate-update]
+
 [ssl-certificate-update]: http://guides.rubygems.org/ssl-certificate-update/#installing-using-update-packages
 
 For a more conventional way of installing Jekyll you can follow this [complete guide to install Jekyll 3 on Windows by Sverrir Sigmundarson][windows-installjekyll3].