fixup comment

Author: nia-e

src/alloc/isolated_alloc.rs

@@ -68,8 +68,7 @@ impl IsolatedAlloc {
     fn huge_normalized_layout(layout: Layout, page_size: usize) -> Layout {
         // Allocate in page-sized chunks
         let size = layout.size().next_multiple_of(page_size);
-        // Align probably *shouldn't* ever be greater than the page size,
-        // but just in case
+        // And make sure the align is at least one page
         let align = std::cmp::max(layout.align(), page_size);
         Layout::from_size_align(size, align).unwrap()
     }