@Override
		public boolean equals(Object obj) {
			if (this == obj) {
				return true;
			}
			if (obj == null) {
				return false;
			}
			if (getClass() != obj.getClass()) {
				return false;
			}
			Diff other = (Diff) obj;
			if (operation != other.operation) {
				return false;
			}
			if (text == null) {
				if (other.text != null) {
					return false;
				}
			} else if (!text.equals(other.text)) {
				return false;
			}
			return true;
		}