Rename method (Ruby convention, returns boolean).

lib/geocoder/lookups/base.rb

@@ -196,7 +196,7 @@ module Geocoder
         "http" + (configuration.use_https ? "s" : "")
       end
 
-      def valid_response(response)
+      def valid_response?(response)
         (200..399).include?(response.code.to_i)
       end
 
@@ -212,7 +212,7 @@ module Geocoder
           check_api_key_configuration!(query)
           response = make_api_request(query)
           body = response.body
-          if cache and valid_response(response)
+          if cache and valid_response?(response)
             cache[key] = body
           end
           @cache_hit = false

lib/geocoder/lookups/google.rb

@@ -16,7 +16,7 @@ module Geocoder::Lookup
       "#{protocol}://maps.googleapis.com/maps/api/geocode/json?" + url_query_string(query)
     end
 
-    def valid_response(response)
+    def valid_response?(response)
       status = parse_json(response.body)["status"]
       super(response) and ['OK', 'ZERO_RESULTS'].include?(status)
     end