54 - regular expressions

## Location within the Book
* Book order number: 7720
* Book build date (Is the date on page 1): 2020-09-16
* Book format (PDF, Epub or Mobi): PDF
* Chapter or Appendix: 54

## Description
The second sentence in the first paragraph feels out of place
> Regular expressions can be error-prone.

Encountering this sentence had me searching for the regular expressions I somehow missed. However, searching both the text and code, this seems to be the only time regular expressions are encountered with this project.

## Possible Solutions
Remove sentence referencing regular expressions.

OR

Provide further explanation around the regex reference such as "if we were using regular expressions in our url dispatcher, this would be more important", etc.

OR

Provide an example in the project that is using regular expressions.

## Your full name so we can provide accurate credit within the book
Carlin Kartchner