Add unsuported scaladoc change

Scaladoc relies heavily on the assumption that there is only one type
clause (so much so it has trouble with some already valid extension
methods)
Therefore support has not yet been extended to interweaved methods

Author: Sporarum

Diff for: scaladoc-testcases/src/tests/methodsAndConstructors.scala

@@ -60,3 +60,6 @@ class Methods:
  def withImplicitParam2(v: String)(implicit ab: Double, a: Int, b: String): String
  = ???
 
+ def clauseInterweaving[T](x: T)[U](y: U)(using (T,U)): (T,U)
+ = ???
+