Chapter 3.3: Duplicate sentence

[Enivex]

• I have searched open and closed issues and pull requests for duplicates, using these search terms:
  • 3.3
• I have checked the latest main branch to see if this has already been fixed, in this file:
  -https://github.com/cognitive-engineering-lab/rust-book/blob/main/src/ch03-03-how-functions-work.md

URL to the section(s) of the book with this problem:
https://rust-book.cs.brown.edu/ch03-03-how-functions-work.html

Description of the problem:
The sentence "Let’s look at some examples." is repeated twice, under "Statements and Expressions".

Suggested fix:
Remove one of them.