Upgrade markdown linter and fix documentation errors (#265)

Author: pkuczynski

.mdlstyle.rb

@@ -1,2 +1,4 @@
 all
-rule 'MD013', :line_length => 1000
+rule 'MD013', line_length: 1000
+exclude_rule 'MD024' # Multiple headers with the same content
+exclude_rule 'MD046' # Code block style

CHANGELOG.md

@@ -11,6 +11,7 @@
 
 * Use sprockets 3.x when running unit tests for Rails 4.2 ([#256](https://github.com/railsconfig/config/pull/256))
 * Cleanup example Rails application used for testing ([#263](https://github.com/railsconfig/config/pull/263))
+* Upgrade markdown linter and fix errors ([#265](https://github.com/railsconfig/config/pull/265))
 
 ## 2.1.0
 
@@ -35,7 +36,7 @@
 ### BREAKING CHANGES
 
 After upgrade to dry-schema 1.0 we had to drop support for Rails `< 4.2` and Ruby `< 2.4`.
-If you need older version of Ruby or Rails, please stick to 1.x version of this gem. 
+If you need older version of Ruby or Rails, please stick to 1.x version of this gem.
 
 ### New features
 

CONTRIBUTING.md

@@ -28,5 +28,5 @@ appraisal rspec
 If you modified any of the documentation files verify their format:
 
 ```bash
-mdl --style .mdlstyle.rb *.md
+mdl *.md
 ```

README.md

@@ -466,8 +466,6 @@ You are very warmly welcome to help. Please follow our [contribution guidelines]
 
 Any and all contributions offered in any form, past present or future are understood to be in complete agreement and acceptance with [MIT](LICENSE) license.
 
-
-
 ## Authors
 
 * [Piotr Kuczynski](http://github.com/pkuczynski)
@@ -479,32 +477,24 @@ Any and all contributions offered in any form, past present or future are unders
 
 ### Code Contributors
 
-This project exists thanks to all the people who contribute. [[Contribute](CONTRIBUTING.md)].
-<a href="https://github.com/railsconfig/config/graphs/contributors"><img src="https://opencollective.com/rubyconfig/contributors.svg?width=890&button=false" /></a>
+This project exists thanks to all the people who contribute and you are very warmly welcome to help. Please follow our [contribution guidelines](CONTRIBUTING.md).
 
-### Financial Contributors
+Any and all contributions offered in any form, past present or future are understood to be in complete agreement and acceptance with the [MIT](LICENSE) license.
 
-[[Become a financial contributor](https://opencollective.com/rubyconfig/contribute)] and and support us with a small donation to help us continue our activities. Thank you if you already one! 🙏 
+[![Contributors](https://opencollective.com/rubyconfig/contributors.svg?width=890&button=false)](https://github.com/railsconfig/config/graphs/contributors)
+
+### Financial Contributors
 
-#### Individuals
+[Become a backer](https://opencollective.com/rubyconfig#backer) and support us with a small monthly donation to help us continue our activities. Thank you if you already one! 🙏
 
-<a href="https://opencollective.com/rubyconfig"><img src="https://opencollective.com/rubyconfig/individuals.svg?width=890"></a>
+[![Backers](https://opencollective.com/rubyconfig/backers.svg?width=890)](https://opencollective.com/rubyconfig)
 
-#### Organizations
+#### Sponsors
 
-Support this project with your organization. Your logo will show up here with a link to your website. [[Contribute](https://opencollective.com/rubyconfig/contribute)]
+Support this project by becoming a [sponsor](https://opencollective.com/rubyconfig#sponsor). Your logo will show up here with a link to your website.
 
-<a href="https://opencollective.com/rubyconfig/organization/0/website"><img src="https://opencollective.com/rubyconfig/organization/0/avatar.svg"></a>
-<a href="https://opencollective.com/rubyconfig/organization/1/website"><img src="https://opencollective.com/rubyconfig/organization/1/avatar.svg"></a>
-<a href="https://opencollective.com/rubyconfig/organization/2/website"><img src="https://opencollective.com/rubyconfig/organization/2/avatar.svg"></a>
-<a href="https://opencollective.com/rubyconfig/organization/3/website"><img src="https://opencollective.com/rubyconfig/organization/3/avatar.svg"></a>
-<a href="https://opencollective.com/rubyconfig/organization/4/website"><img src="https://opencollective.com/rubyconfig/organization/4/avatar.svg"></a>
-<a href="https://opencollective.com/rubyconfig/organization/5/website"><img src="https://opencollective.com/rubyconfig/organization/5/avatar.svg"></a>
-<a href="https://opencollective.com/rubyconfig/organization/6/website"><img src="https://opencollective.com/rubyconfig/organization/6/avatar.svg"></a>
-<a href="https://opencollective.com/rubyconfig/organization/7/website"><img src="https://opencollective.com/rubyconfig/organization/7/avatar.svg"></a>
-<a href="https://opencollective.com/rubyconfig/organization/8/website"><img src="https://opencollective.com/rubyconfig/organization/8/avatar.svg"></a>
-<a href="https://opencollective.com/rubyconfig/organization/9/website"><img src="https://opencollective.com/rubyconfig/organization/9/avatar.svg"></a>
+[![Sponsors](https://opencollective.com/rubyconfig/sponsors.svg?width=890)](https://opencollective.com/rubyconfig)
 
 ## License
 
-Config is released under the [MIT License](http://www.opensource.org/licenses/MIT).
+Copyright (C) Piotr Kuczynski. Released under the [MIT License](LICENSE).

config.gemspec

@@ -44,7 +44,7 @@ Please consider donating to our open collective to help us maintain this project
   end
 
   # Static code analysis
-  s.add_development_dependency 'mdl', '~> 0.5', '>= 0.5.0'
+  s.add_development_dependency 'mdl', '~> 0.8', '>= 0.8.0'
 
   # Version 0.62 requires Ruby 2.2
   s.add_development_dependency 'rubocop', '~> 0.62'