Do not crash on a typoed legacy fact hash syntax (i.e., missing closing quote)

Author: chutzimir

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

@@ -117,11 +117,11 @@ def check
 
       # This matches legacy facts defined in the fact hash that use the top scope
       # fact assignment.
-      if token.value.start_with?("::facts['")
+      if token.value.match(%r{::facts\['(.*)'\]})
         fact_name = token.value.match(%r{::facts\['(.*)'\]})[1]
 
       # This matches legacy facts defined in the fact hash.
-      elsif token.value.start_with?("facts['")
+      elsif token.value.match(%r{facts\['(.*)'\]})
         fact_name = token.value.match(%r{facts\['(.*)'\]})[1]
 
       # This matches using legacy facts in a the new structured fact. For