rustdoc: Note that type layout may differ between compilations

src/librustdoc/html/render/print_item.rs

@@ -1663,7 +1663,7 @@ fn write_size_of_layout(w: &mut Buffer, layout: &Layout, tag_size: u64) {
             writeln!(
                 w,
                 "<div class=\"warning\"><p><strong>Note:</strong> Most layout information is \
-                 completely unstable and may be different between compiler versions and platforms. \
+                 completely unstable and may even differ between compilations. \
                  The only exception is types with certain <code>repr(...)</code> attributes. \
                  Please see the Rust Reference’s \
                  <a href=\"https://doc.rust-lang.org/reference/type-layout.html\">“Type Layout”</a> \