Add/Fix benchmarks

testcases/repair/Desugar/Desugar2.scala

testcases/repair/HeapSort/HeapSort5.scala

testcases/repair/HeapSort/HeapSort8.scala

testcases/repair/List/FirstIndexOf.scala

testcases/repair/List/FirstIndexOf1.scala

testcases/repair/List/FirstIndexOf2.scala

testcases/repair/List/FirstIndexOf3.scala

testcases/repair/List/FirstIndexOf4.scala

testcases/repair/List/List.scala

testcases/repair/List/List1.scala

testcases/repair/List/List2.scala

testcases/repair/List/List3.scala

testcases/repair/List/List4.scala

testcases/repair/List/List5.scala

testcases/repair/List/List6.scala

testcases/repair/List/Size.scala

testcases/repair/List/Size1.scala

testcases/repair/List/Sum.scala

testcases/repair/List/Sum1.scala

testcases/repair/RedBlackTree-old/RedBlackTree.scala