Typo in Chapter 19.4

[dsabira]

What Course are you in thinkcspy

What Page were you on section 19.4

What is your username dsabira

Describe the bug There is a typo at section of 19.4. The text says: "The first thing to notice about this version of LabeledPoint does not inherit from Point." However, it should be "The first thing to notice about this version of LabeledPoint is that it does not inherit from Point."

Traceback thinkcspy Section 19.4

Javascript Errors

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