Fixed typo in provider/mysql_grant/mysql.rb (#988)

Author: llowder

lib/puppet/provider/mysql_grant/mysql.rb

@@ -114,7 +114,7 @@ def revoke(user, table, revoke_privileges = ['ALL'])
 
   def destroy
     # if the user was dropped, it'll have been removed from the user hash
-    # as the grants are alraedy removed by the DROP statement
+    # as the grants are already removed by the DROP statement
     if self.class.users.include? @property_hash[:user]
       if @property_hash[:privileges].include?('PROXY')
         revoke(@property_hash[:user], @property_hash[:table], @property_hash[:privileges])