A high loss scale in the L-BFGS-B minimizer, caused by averaging Huber-loss values over examples instead of summing them, which led to premature termination of the optimization.
技术细节如损失函数的求和方式而非平均，可能导致优化提前终止，影响缩放定律拟合结果。这提醒我们，在实现算法时需注意细节，即使是看似微小的实现差异也可能导致显著不同的结果。
always use real <label for="correct_input"> elements. Just that alone is a UX consideration all too many forms fail on
What we actually want to do is to escape content if it is unsafe, but leave it unescaped if it is safe. To achieve this we can simply use SafeBuffer's concatenation behavior:
Our helper still returns a safe string, but correctly escapes content if it is unsafe. Note how much more flexible our group helper has become because it now works as expected with both safe and unsafe arguments. We can now leave it up to the caller whether to mark input as safe or not, and we no longer need to make any assumptions about the safeness of content.