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error: `format!(..)` appended to existing `String`
--> $DIR/format_push_string.rs:5:5
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LL | string += &format!("{:?}", 1234);
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: `-D clippy::format-push-string` implied by `-D warnings`
= help: consider using `write!` to avoid the extra allocation
error: `format!(..)` appended to existing `String`
--> $DIR/format_push_string.rs:6:5
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LL | string.push_str(&format!("{:?}", 5678));
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= help: consider using `write!` to avoid the extra allocation
error: aborting due to 2 previous errors
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