fix super path wrong display

crates/hir_ty/src/display.rs

@@ -1141,13 +1141,15 @@ fn hir_fmt(&self, f: &mut HirFormatter) -> Result<(), HirDisplayError> {
                 write!(f, ">")?;
             }
             (_, PathKind::Plain) => {}
-            (_, PathKind::Abs) => write!(f, "")?,
+            (_, PathKind::Abs) => {}
             (_, PathKind::Crate) => write!(f, "crate")?,
             (_, PathKind::Super(0)) => write!(f, "self")?,
             (_, PathKind::Super(n)) => {
-                write!(f, "super")?;
-                for _ in 0..*n {
-                    write!(f, "::super")?;
+                for i in 0..*n {
+                    if i > 0 {
+                        write!(f, "::")?;
+                    }
+                    write!(f, "super")?;
                 }
             }
             (_, PathKind::DollarCrate(_)) => write!(f, "{{extern_crate}}")?,

crates/ide/src/hover.rs

@@ -963,7 +963,7 @@ pub fn foo(a: u32, b: u32) {}
             "#]],
         );
 
-        // use literal `crate` in path
+        // Use literal `crate` in path
         check(
             r#"
 pub struct X;
@@ -984,6 +984,28 @@ fn foo() -> crate::X
             ```
         "#]],
         );
+
+        // Check `super` in path
+        check(
+            r#"
+pub struct X;
+
+mod m { pub fn foo() -> super::X { super::X } }
+
+fn main() { m::f$0oo(); }
+        "#,
+            expect![[r#"
+                *foo*
+
+                ```rust
+                test::m
+                ```
+
+                ```rust
+                pub fn foo() -> super::X
+                ```
+            "#]],
+        );
     }
 
     #[test]