[?] Typo in FAST INTRODUCTION FOR PROGRAMMERS - Strings section?

Ideas
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1

In the check your understanding section there is an option:

StringReplace["lead",_"gold"]

with the following explanation:

"This replaces each letter separately, resulting in goldgoldgoldgold, instead of making just one replacement of the whole string.".

However, what you get (see attached) is:

gold is not a valid string replacement rule.

2

When I go to that section, Strings | Wolfram Language Fast Introduction for Programmers, I don’t see StringReplace["lead",_"gold"], which isn’t valid syntax. I see StringReplace["lead",_ -> "gold"]

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3

Pretty stupid of me. Thank you. I will try being more careful before commenting next time. Thank you.

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