Bukkit

###What steps will reproduce the problem?

1. Create sign as usual with %5 line
2. Activate the sign
3. The sign will wait 5 seconds instead of working 5 percent of the time.

###What is the expected output? What do you see instead? Commands in sign expected to work and not work randomly, 5% of the time.

###What version of the product are you using? 1.9.1.1

###Do you have an error log of what happened? No, but can provide if needed.

###Please provide any additional information below. Am I doing something wrong? Such behavior is expected because it's stated as such in Tutorial / Advanced Usage

`%percent` - Restrict sign to work only a certain percentage of the time.