Commit 4123d33

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Remove impossible panic note from Vec::append

Neither the number of elements in a vector can overflow a `usize`, nor can the amount of elements in two vectors.

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Original file line number	Diff line number	Diff line change
`@@ -1767,7 +1767,7 @@ impl<T, A: Allocator> Vec<T, A> {`
`1767`	`1767`	`///`
`1768`	`1768`	`/// # Panics`
`1769`	`1769`	`///`
`1770`		- /// Panics if the number of elements in the vector overflows a `usize`.
	`1770`	+ /// Panics if the new capacity exceeds `isize::MAX` bytes.
`1771`	`1771`	`///`
`1772`	`1772`	`/// # Examples`
`1773`	`1773`	`///`

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