Tweak output

compiler/rustc_errors/src/emitter.rs

@@ -2282,7 +2282,7 @@ impl FileWithAnnotatedLines {
         }
 
         // Find overlapping multiline annotations, put them at different depths
-        multiline_annotations.sort_by_key(|&(_, ref ml)| (ml.line_start, ml.line_end));
+        multiline_annotations.sort_by_key(|&(_, ref ml)| (ml.line_start, usize::MAX - ml.line_end));
         for (_, ann) in multiline_annotations.clone() {
             for (_, a) in multiline_annotations.iter_mut() {
                 // Move all other multiline annotations overlapping with this one

src/test/ui/alloc-error/alloc-error-handler-bad-signature-1.stderr

@@ -13,7 +13,7 @@ LL | || ) -> ()
 LL | |  {
 LL | |      loop {}
 LL | |  }
-   |  |_^ expected `&Layout`, found struct `Layout`
+   | |__^ expected `&Layout`, found struct `Layout`
    |
 note: function defined here
   --> $DIR/alloc-error-handler-bad-signature-1.rs:10:4
@@ -39,7 +39,7 @@ LL | || ) -> ()
 LL | |  {
 LL | |      loop {}
 LL | |  }
-   |  |_- expected `!` because of return type
+   | |__- expected `!` because of return type
    |
    = note:   expected type `!`
            found unit type `()`

src/test/ui/alloc-error/alloc-error-handler-bad-signature-2.stderr

@@ -9,12 +9,10 @@ LL |    fn oom(
    | ||
 LL | ||     info: Layout,
 LL | || ) {
-   | || -
-   | ||_|
-   |  | arguments to this function are incorrect
+   | ||_- arguments to this function are incorrect
 LL | |      loop {}
 LL | |  }
-   |  |_^ expected struct `Layout`, found struct `core::alloc::Layout`
+   | |__^ expected struct `Layout`, found struct `core::alloc::Layout`
    |
    = note: struct `core::alloc::Layout` and struct `Layout` have similar names, but are actually distinct types
 note: struct `core::alloc::Layout` is defined in crate `core`
@@ -47,12 +45,10 @@ LL |    fn oom(
    | ||
 LL | ||     info: Layout,
 LL | || ) {
-   | || ^
-   | ||_|
-   |  | expected `!`, found `()`
+   | ||_^ expected `!`, found `()`
 LL | |      loop {}
 LL | |  }
-   |  |_- expected `!` because of return type
+   | |__- expected `!` because of return type
    |
    = note:   expected type `!`
            found unit type `()`

src/test/ui/suggestions/suggest-remove-refs-3.stderr

@@ -9,7 +9,7 @@ LL | ||         & &v
    | ||___________- help: consider removing 5 leading `&`-references
 LL | |          .iter()
 LL | |          .enumerate() {
-   |  |____________________^ `&&&&&Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator
+   | |_____________________^ `&&&&&Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator
    |
    = help: the trait `Iterator` is not implemented for `&&&&&Enumerate<std::slice::Iter<'_, {integer}>>`
    = note: required for `&&&&&Enumerate<std::slice::Iter<'_, {integer}>>` to implement `IntoIterator`