jekyll minor format

Author: jgvictores

docs/install-jekyll.md

@@ -14,28 +14,34 @@ sudo gem install bundler jekyll
 ```
 
 ## To be able to serve via Jekyll
+
 Make sure your project has a file called `Gemfile` in its root with the following contents:
+
 ```
 source 'https://rubygems.org'
 gem 'github-pages', group: :jekyll_plugins
 ```
 
 It is also common practice to have a file called `.gitignore` in the project root with (at least) the following contents:
+
 ```
 # Jekyll generated
 /_site/
 /Gemfile.lock
 ```
 
 ## Serve via Jekyll
+
 ```bash
 bundle exec jekyll serve
 ```
 
 Now browse to <http://localhost:4000>
 
 ## Troubleshooting Jekyll
+
 To install missing components:
+
 ```bash
 bundle install
 ```