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diff --git a/src/docs/drop_ref.txt b/src/docs/drop_ref.txt
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--- a/src/docs/drop_ref.txt
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-### What it does
-Checks for calls to `std::mem::drop` with a reference
-instead of an owned value.
-
-### Why is this bad?
-Calling `drop` on a reference will only drop the
-reference itself, which is a no-op. It will not call the `drop` method (from
-the `Drop` trait implementation) on the underlying referenced value, which
-is likely what was intended.
-
-### Example
-```
-let mut lock_guard = mutex.lock();
-std::mem::drop(&lock_guard) // Should have been drop(lock_guard), mutex
-// still locked
-operation_that_requires_mutex_to_be_unlocked();
-```
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