Merge commit 'f4850f7292efa33759b4f7f9b7621268979e9914' into clippyup

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diff --git a/src/docs/integer_arithmetic.txt b/src/docs/integer_arithmetic.txt
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--- a/src/docs/integer_arithmetic.txt
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-### What it does
-Checks for integer arithmetic operations which could overflow or panic.
-
-Specifically, checks for any operators (`+`, `-`, `*`, `<<`, etc) which are capable
-of overflowing according to the [Rust
-Reference](https://doc.rust-lang.org/reference/expressions/operator-expr.html#overflow),
-or which can panic (`/`, `%`). No bounds analysis or sophisticated reasoning is
-attempted.
-
-### Why is this bad?
-Integer overflow will trigger a panic in debug builds or will wrap in
-release mode. Division by zero will cause a panic in either mode. In some applications one
-wants explicitly checked, wrapping or saturating arithmetic.
-
-### Example
-```
-a + 1;
-```
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