Merge pull request #632 from knu/fix_date_error

Properly rescue ::ArgumentError in the date filter

lib/liquid/utils.rb

@@ -72,7 +72,7 @@ module Liquid
       when String
         Time.parse(obj)
       end
-    rescue ArgumentError
+    rescue ::ArgumentError
       nil
     end
   end

test/integration/standard_filter_test.rb

@@ -420,6 +420,11 @@ class StandardFiltersTest < Minitest::Test
     assert_template_result('a', "{{ 'a' | to_number }}")
   end
 
+  def test_date_raises_nothing
+    assert_template_result('', "{{ '' | date: '%D' }}")
+    assert_template_result('abc', "{{ 'abc' | date: '%D' }}")
+  end
+
   private
 
   def with_timezone(tz)