(GH-189) - invalid fact correction for top scope structured fact

Prior to this commit, if you had a top scope structured fact like this
in your manifest `$::my_structured_fact['foo']['test']`, lint would
return an invalid correction when passed the fix flag.

Now, we have altered the top_scope_facts plugin, to first check if it is
a structured fact, and if one is found using regex, apply different
logic to fix.

lib/puppet-lint/plugins/top_scope_facts/top_scope_facts.rb

@@ -44,6 +44,15 @@ def check
   end
 
   def fix(problem)
-    problem[:token].value = "facts['" + problem[:token].value.sub(%r{^::}, '') + "']"
+    problem[:token].value = problem[:token].value.sub(%r{^::}, '')
+    # checks if the fact is a top level structured fact fact e.g. ::my_structured_fact['foo']['bar']
+    if %r{\[.*}.match?(problem[:token].value)
+      top_scope_variable = problem[:token].value.sub(%r{\[.*}, '')
+      structured_facts = problem[:token].value.scan(%r{\[.+}).first
+      problem[:token].value = "facts['" + top_scope_variable + "']" + structured_facts
+      problem[:token].value.sub!('"', '\'')
+    else
+      problem[:token].value = "facts['" + problem[:token].value + "']"
+    end
   end
 end