Hi, very nice RegEx educational site/book.

Feedback:

- In the chapter https://refrf.shreyasminocha.me/chapters/character-classes an example is given which uses:

  o ^ character outside brackets

  o $ end of line

  o +

But the explanation above does not introduce these yet, so a real beginner user (like me) is lost. The ambigious characters example is fine, since it uses all the concepts already explained.