Update library/alloc/src/vec/mod.rs

Co-authored-by: Jubilee <[email protected]>

Author: hkBst

library/alloc/src/vec/mod.rs

@@ -364,7 +364,7 @@ mod spec_extend;
 /// It is guaranteed that the [`Vec::capacity`] method returns a value that is at least the requested capacity
 /// and not more than the allocated capacity.
 ///
-/// The method [`Vec::shrink_to_fit`] can discard excess capacity an allocator has given to a `Vec`.
+/// The method [`Vec::shrink_to_fit`] will attempt to discard excess capacity an allocator has given to a `Vec`.
 /// If <code>[len] == [capacity]</code>, then a `Vec<T>` can be converted
 /// to and from a [`Box<[T]>`][owned slice] without reallocating or moving the elements.
 /// `Vec` exploits this fact as much as reasonable when implementing common conversions