Fix SlackNotifier url and audit results rule name

Author: newbishme

lib/slack_notifier.rb

@@ -11,13 +11,13 @@ def initialize(webhook, project_id, commit_hash, audit_result)
 
   def notify
     notifier = Slack::Notifier.new @webhook
-    notifier.ping "Commit hash [#{@commit_hash}](https://#{@project_name}/commit/#{@commit_hash}) of the project #{@project_name} has been detected to violate the following:\n#{rule_name}\n"
+    notifier.ping "Commit hash [#{@commit_hash}](https://github.com/#{@project_name}/commit/#{@commit_hash}) of the project #{@project_name} has been detected to violate the following:\n#{rule_name}\n"
   end
 
   private
 
   def rule_name
-    return @audit_result['rule_name'] if @audit_result.key?('rule_name')
+    return @audit_result[:rule_name] if @audit_result[:rule_name]
     'Unknown rule/Improper audit result object returned.'
   end
 end