toolbox: modify the godocs

toolbox/debug.go

-// most reference from github.com/realint/dbgutil
+// Here are the features: healthcheck, profile, statistics and task.
 package toolbox
 
 import (
@@ -34,7 +34,6 @@ func Display(data ...interface{}) {
 	display(true, data...)
 }
 
-
 // return data print string
 func GetDisplayString(data ...interface{}) string {
 	return display(false, data...)