added 'clean_command_line_interval' option

lua/autosave/config.lua

@@ -7,7 +7,8 @@ config.options = {
     write_all_buffers = false,
     on_off_commands = false,
     save_only_if_exists = true,
-    excluded_filetypes = {}
+    excluded_filetypes = {},
+	clean_command_line_interval = 0
 }
 
 function config.set_options(opts)

lua/autosave/modules/autocmds.lua

@@ -64,7 +64,12 @@ function M.save()
 
     if (opts["execution_message"] ~= "" and get_modified() == true) then
         print(opts["execution_message"])
+		set_modified(false)
     end
+
+	if (opts["clean_command_line_interval"] > 0) then
+		cmd([[sleep ]] .. opts["clean_command_line_interval"] .. [[ | echon '']])
+	end
 end
 
 local function parse_events()