* Create a new method that replaces <code> tags to
triple back ticks (```)
* Create unit tests for add_proper_code_tags method
* Rubocop fixes
* Change method name to one that is more descriptive/accurate
Fix method to allow for triple backticks, sameline code tags and multiline codetags in the same post/article
Fix test to match with method name change
* Fix rubocop offenses
* Fix Rubocop offenses
* Add additional assertions to make sure backticks are present
* Create new MarkdownProcessor::Fixer services
* Remove old MarkdownFixer
* Code cleanup
* Capitalize Base in code comments
* Remove comments related to inheritance
* Add fix_methods method to hold METHDOS constant