ensure ERB is required

Author: mikehale

lib/geocoder/lookups/bing.rb

@@ -19,6 +19,7 @@ def required_api_key_parts
     private # ---------------------------------------------------------------
 
     def base_query_url(query)
+      require 'erb' unless defined?(ERB) && defined?(ERB::Util.url_encode)
       text = ERB::Util.url_encode(query.sanitized_text.strip)
       url = "#{protocol}://dev.virtualearth.net/REST/v1/Locations/"
       if query.reverse_geocode?