Fix rubocop warnings

test/lib/bounding_box_test.rb

@@ -306,7 +306,7 @@ class BoundingBoxTest < ActiveSupport::TestCase
 
   def check_expand(bbox, array_string, margin = 0, result = nil)
     array = array_string.split(",").collect(&:to_f)
-    result = array unless result
+    result ||= array
     bbox.expand!(BoundingBox.new(array[0], array[1], array[2], array[3]), margin)
     check_bbox(bbox, result)
   end

test/lib/i18n_test.rb

@@ -13,7 +13,7 @@ class I18nTest < ActiveSupport::TestCase
         if default_value.is_a?(Hash)
           variables.push("count")
 
-          default_value.each do |_subkey, subvalue|
+          default_value.each_value do |subvalue|
             subvalue.scan(/%\{(\w+)\}/) do
               variables.push(Regexp.last_match(1))
             end