添加注释，修改变量命名

lib/plugins/acts_as_activity_provider/lib/acts_as_activity_provider.rb

@@ -49,8 +49,11 @@ module Redmine
         end
 
         module ClassMethods
+          # Time 2015-01-27 16:30:47
+          # Author lizanle
+          # Description 用原来的写法from,to更加容易懂
           # Returns events of type event_type visible by user that occured between from and to
-          def find_events(event_type, user, days, created_time, options)
+          def find_events(event_type, user, from, to, options)
             provider_options = activity_provider_options[event_type]
             raise "#{self.name} can not provide #{event_type} events." if provider_options.nil?
 
@@ -93,7 +96,7 @@ module Redmine
             end
             # Time 2015-01-27 15:18:33
             # Author lizanle
-            # Description 删除 unless scope.all，因为这个执行查询，并且没有加入时间限制，与下边 scope.all(provider_options[:find_options].dup)的重复查询
+            # Description 删除 unless scope.all，因为这个执行查询，并且没有加入时间限制，与下边 scope.all(provider_options[:find_options].dup)重复
             if options[:course]
               if provider_options[:timestamp].include? "updated_on"
                 to = scope.scoped(:order => "#{provider_options[:timestamp]} desc").all(provider_options[:find_options].dup).first.updated_on
@@ -102,7 +105,7 @@ module Redmine
               end
                 from = (to - days.days) > created_time ? (to - days.days) : created_time.to_date
             else
-                from =  to - Setting.activity_days_default.to_i
+                #from =  to - Setting.activity_days_default.to_i
             end
 
             if from && to