About '\w' explaination in chapter 3. Shorthand Character Sets

[Melbwjl]

in chapter 3. Shorthand Character Sets of \w description is not inaccurate,this error both in Chinese and English versions

English_version:

Shorthand	Description
\w	Matches alphanumeric characters: [a-zA-Z0-9_]

Issue: There should also have underline(-)

Chinese _version:

简写	描述
\w	匹配所有字母数字，等同于 [a-zA-Z0-9_]

Issue:中文翻译中同样未提及下划线（-）

My English is not very good, hope you can understand.