Adding good and bad examples to three cops

Sayeed Ahmadrequested to merge
sayeedahmad/gitlab-styles:add-good-bad-examples into master

This MR is related to the issue: Issue77

This MR adds good and bad examples for the three files as below:

  1. 'lib/rubocop/cop/gitlab_security/deep_munge.rb'
  2. 'lib/rubocop/cop/line_break_around_conditional_block.rb'
  3. 'lib/rubocop/cop/migration/update_large_table.rb'

Merge request reports