Update compiler/src/dotty/tools/dotc/core/Definitions.scala

Co-authored-by: Guillaume Martres <[email protected]>

Author: BarkingBad

compiler/src/dotty/tools/dotc/core/Definitions.scala

@@ -1985,14 +1985,9 @@ class Definitions {
     """.stripMargin,
 
     orType ->
-    """/**
-      | *
-      | *
-      | *
-      | *
-      | *
-      | *
+    """/** The union of two types.
       | *
+      | *   See [[https://dotty.epfl.ch/docs/reference/new-types/union-types.html]].
       | */
     """.stripMargin,