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Fix listing reference in the 20.05 Macros chapter #4651

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Fix listing reference in the 20.05 Macros chapter #4651

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2 changes: 1 addition & 1 deletion src/ch20-05-macros.md
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Expand Up @@ -110,7 +110,7 @@ one arm.
Valid pattern syntax in macro definitions is different from the pattern syntax
covered in Chapter 19 because macro patterns are matched against Rust code
structure rather than values. Let’s walk through what the pattern pieces in
Listing 20-29 mean; for the full macro pattern syntax, see the [Rust
Listing 20-35 mean; for the full macro pattern syntax, see the [Rust
Reference][ref].

First, we use a set of parentheses to encompass the whole pattern. We use a
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