fix typo

add a punctuation - colon

* fix arange api in ndarray.md

* fix arange api in ndarray.md
Co-authored-by: NRiddler <luya.wang@qq.com>
Co-authored-by: NAston Zhang <22279212+astonzhang@users.noreply.github.com>

根据英文原版应该是2i和2i+1。

Co-authored-by: Nquan@alienwareArea51 <quan@alienwareArea51>

Co-authored-by: NUbuntu <ubuntu@ip-172-31-12-66.us-west-2.compute.internal>

看上去应该是“浮点计算能力是价格的仿射函数？”
原版中也写了price is the affine function of the price，是否是有小笔误呢～

* Update anchor.md

### 一个例子 中翻译不准确的地方
锚箱标签->锚框标签               //锚框在本书中使用的更多，锚箱看起来很奇怪
地面真实边界框->真实边界框        //ground truth中的ground翻译为了地面，但是ground truth应该指的是真实框而与地面无关

* Update anchor.md

Hey @Ryan-ly , from your inspiration, i removed other `地面` occurrences. Thanks!
Co-authored-by: Ngoldmermaid <goldpiggy@berkeley.edu>

删除了多余的逗号。

Co-authored-by: NUbuntu <ubuntu@ip-172-31-12-66.us-west-2.compute.internal>

* BUG: Fix loss and metric calculation

* Sync MSELoss with MXNet L2Loss

* Sync MSELoss with MXNet L2Loss undefit-overfit

* Sync MSELoss with MXNet L2Loss softmax-regression-scratch

* Update d2l lib for train_epoch_ch3

* Use reduction=none minibatch sgd

* Update d2l lib for train_concise_ch11

* Fix loss computation in weight decay train_concise

* drop 1/2 factor attention

* add eqmse label

* drop 1/2 underfit-overfit

* drop 1/2 softmax-scratch

* drop 1/2

* drop 1/2 tf

* drop 1/2 tf minibatch sgd

* 0.17.1

* translate minibatch sgd

* translate sequence
Co-authored-by: NAston Zhang <asv325@gmail.com>

Co-authored-by: NUbuntu <ubuntu@ip-172-31-12-66.us-west-2.compute.internal>

* align exercise with the english version

* fix

Co-authored-by: NUbuntu <ubuntu@ip-172-31-12-66.us-west-2.compute.internal>