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style-guide: Document newline rules for assignment operators #113145

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Jul 6, 2023
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style-guide: Document newline rules for assignment operators #113145

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5 changes: 3 additions & 2 deletions src/doc/style-guide/src/expressions.md
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Expand Up @@ -294,8 +294,9 @@ Use parentheses liberally, do not necessarily elide them due to precedence.
Tools should not automatically insert or remove parentheses. Do not use spaces
to indicate precedence.

If line-breaking, put the operator on a new line and block indent. Put each
sub-expression on its own line. E.g.,
If line-breaking, block-indent each subsequent line. For assignment operators,
break after the operator; for all other operators, put the operator on the
subsequent line. Put each sub-expression on its own line:

```rust
foo_bar
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