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style-guide: Fix chain example to match rustfmt behavior

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The style guide gave an example of breaking a multi-line chain element
and all subsequent elements to a new line, but that same example and the
accompanying text also had several chain items stacked on the first
line. rustfmt doesn't do this, except when the rule saying to combine

```
shrt
    .y()
```

into

```
shrt.y()
```

applies.
This commit is contained in:
Josh Triplett 2023-07-05 15:33:21 -07:00
parent 5dac6b320b
commit 24534cffe6
1 changed files with 3 additions and 4 deletions
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7
src/doc/style-guide/src/expressions.md
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@ -450,12 +450,11 @@ foo(
#### Multi-line elements #### Multi-line elements
If any element in a chain is formatted across multiple lines, then that element If any element in a chain is formatted across multiple lines, put that element
and any later elements must be on their own line. Earlier elements may be kept and any later elements on their own lines.
on a single line. E.g.,
```rust ```rust
a.b.c()?.d a.b.c()?
.foo( .foo(
an_expr, an_expr,
another_expr, another_expr,