Merge #11247

11247: Print a single ellipsis for any number of omitted types r=jonas-schievink a=jonas-schievink

Helps a little bit with https://github.com/rust-analyzer/rust-analyzer/issues/11240

bors r+

Co-authored-by: Jonas Schievink <jonas.schievink@ferrous-systems.com>

crates/hir_ty/src/display.rs

@@ -151,6 +151,12 @@ pub fn write_joined<T: HirDisplay>(
                 write!(self, "{}", sep)?;
             }
             first = false;
+
+            // Abbreviate multiple omitted types with a single ellipsis.
+            if self.should_truncate() {
+                return write!(self, "{}", TYPE_HINT_TRUNCATION);
+            }
+
             e.hir_fmt(self)?;
         }
         Ok(())