clean up [ci skip]

lib/impressionist/counter_cache.rb

@@ -28,7 +28,6 @@ module Impressionist
           to_s.safe_constantize           || false
       end
 
-      # default mode is ERROR
       def impressionist_log(str, mode=:error)
         Rails.logger.send(mode.to_s, str)
       end

lib/impressionist/update_counters.rb

@@ -1,6 +1,6 @@
 # Note
 # If impressionist_counter_cache_options[:counter_cache] is false(default)
-# it won't event run this class
+# it won't even run this class
 module Impressionist
 
   class UpdateCounters