Documentation issue in Section 19.3

[William-B-G]

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Description of the problem: Possible wording error in Section 19.3 — “Parts of a Value with a Nested _”

In Section 19.3, under “Parts of a Value with a Nested _”, the text says:

“In all other cases (if either setting_value or new_setting_value is None) expressed by the _ pattern in the second arm, we want to allow new_setting_value to become setting_value.”

However, the assignment being discussed is:

setting_value = new_setting_value;

Since new_setting_value is assigned to setting_value, it appears the wording should instead be:

“…we want to allow setting_value to become new_setting_value.”

I believe the current wording reverses the direction of the assignment. Could you please verify?

Suggested fix: I believe the last part of the passage should be '... setting_value to become new_setting_value.'