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.

diff --git a/library/alloc/src/vec/mod.rs b/library/alloc/src/vec/mod.rs
index 5131168db0c82bb972889c2dc630fd5bf3405786..6c730ab3c8688303167da747c7374925e79a9ed9 100644 (file)
--- a/library/alloc/src/vec/mod.rs
+++ b/library/alloc/src/vec/mod.rs
@@ -1767,7 +1767,7 @@ pub fn pop(&mut self) -> Option<T> {
     ///
     /// # Panics
     ///
-    /// Panics if the number of elements in the vector overflows a `usize`.
+    /// Panics if the new capacity exceeds `isize::MAX` bytes.
     ///
     /// # Examples
     ///