[Scope & Closures] Practice Closure 3 Textual Issue

[hochan222]

I already searched for this issue

Edition: (1st or 2nd)
2nd

Book Title:
Scope & Closure

Chapter:
Practice

Section Title:
Closure 3

Problem:

useCalc(calc,"*8="); // *5=128

must be

useCalc(calc,"*8="); // *8=128

Of course, the author said that all minor errors will be corrected, but he says he will not make revised versions of future books (for next chapter), so I leaves it to help with the inspection. I uploaded it because it was not in the issue.

In addition, I read well. This book gave me a fresh perspective on understanding closures. Thank you.

Pull Request #1717