docs: make some text changes on Section Macros
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(1) In contrast to `that`, `so that` expresses `result` indicated by the sentence, not `reason`; (2) `block` is an expression, and may be have an expression, so I add `optional an expression` to make more precise; (3) When I read here, I was confused with what `the child` referred to. After modification, it would be better.
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src/doc/book/macros.md
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| * `pat`: a pattern. Examples: `Some(t)`; `(17, 'a')`; `_`. | ||
| * `stmt`: a single statement. Example: `let x = 3`. | ||
| * `block`: a brace-delimited sequence of statements. Example: | ||
| * `block`: a brace-delimited sequence of statements and optional an expression. Example: |
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@bors: r+ rollup |
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docs: make some text changes on Section `Macros` (1) In contrast to `that`, `so that` expresses `result` indicated by the sentence, not `reason`; (2) `block` is an expression, and may be have an expression, so I add `optionally an expression` to make more precise; ~~(3) When I read here, I was confused with what `the child` referred to. After modification, it would be better.~~
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(1) In contrast to
that,so thatexpressesresultindicated by the sentence, notreason;(2)
blockis an expression, and may be have an expression, so I addoptionally an expressionto make more precise;(3) When I read here, I was confused with whatthe childreferred to. After modification, it would be better.