Sort unstable items last in rustdoc, instead of first

Author: dtolnay

src/librustdoc/html/render/print_item.rs

@@ -369,8 +369,8 @@ fn item_module(w: &mut Buffer, cx: &mut Context<'_>, item: &clean::Item, items:
         if let (Some(a), Some(b)) = (s1, s2) {
             match (a.is_stable(), b.is_stable()) {
                 (true, true) | (false, false) => {}
-                (false, true) => return Ordering::Less,
-                (true, false) => return Ordering::Greater,
+                (false, true) => return Ordering::Greater,
+                (true, false) => return Ordering::Less,
             }
         }
         let lhs = i1.name.unwrap_or(kw::Empty);

tests/rustdoc/stability.rs

@@ -3,9 +3,9 @@
 #![unstable(feature = "test", issue = "none")]
 
 // @has stability/index.html
-// @has - '//ul[@class="item-table"]/li[1]//a' Unstable
-// @has - '//ul[@class="item-table"]/li[2]//a' AaStable
-// @has - '//ul[@class="item-table"]/li[3]//a' ZzStable
+// @has - '//ul[@class="item-table"]/li[1]//a' AaStable
+// @has - '//ul[@class="item-table"]/li[2]//a' ZzStable
+// @has - '//ul[@class="item-table"]/li[3]//a' Unstable
 
 #[stable(feature = "rust2", since = "2.2.2")]
 pub struct AaStable;