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Fix assignment direction in ch19-03 nested _ example #4824

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Fix assignment direction in ch19-03 nested _ example #4824

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2 changes: 1 addition & 1 deletion src/ch19-03-pattern-syntax.md
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Expand Up @@ -346,7 +346,7 @@ changed.

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`.
`setting_value` to become `new_setting_value`.

We can also use underscores in multiple places within one pattern to ignore
particular values. Listing 19-19 shows an example of ignoring the second and
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