Updated README

Author: jvlobo

Diff for: README.md

@@ -18,6 +18,7 @@ require 'charlcd'
 char_lcd = CharLcd.new
 char_lcd.begin(16, 2)
 char_lcd.message("First Line\nSecond Line")
+char_lcd.clean_pins()
 ```
 
 License

Diff for: lib/charlcd.rb

@@ -203,7 +203,7 @@ def delay_microseconds(microseconds)
     sleep(seconds)
   end
 
-  def clean_pins()
+  def clean_pins
     RPi::GPIO.clean_up
   end
 end