code: function(state) {
  	   if(state == inputEx.stateInvalid && this.options.minLength && this.el.value.length < this.options.minLength) {
  	      return inputEx.messages.stringTooShort[0]+this.options.minLength+inputEx.messages.stringTooShort[1];
        }
  	   return inputEx.StringField.superclass.getStateString.call(this, state);
  	}
docs: Add the minLength string message handling