Add testcases for signatures with slightly more complex names

Author: Kordyjan

scala3doc-testcases/src/tests/complexNames.scala

@@ -0,0 +1,12 @@
+package tests
+
+package complexNames
+
+abstract class A:
+  def ++(other: A): A
+  def +:(other: Int): A
+  def :+(other: Int): A
+  // scala3doc has problems with names in backticks
+  // def `multi word name`: Int
+  // def `*** name with arbitrary chars ^%`: Int
+  def complexName_^*(param: String): A

scala3doc/test/dotty/dokka/SignatureTestCases.scala

@@ -55,4 +55,6 @@ class Annotations extends SignatureTest("annotations", SignatureTest.all)
 class InheritanceLoop extends SignatureTest("inheritanceLoop", SignatureTest.all)
 
 class InheritedMembers extends SignatureTest("inheritedMembers2", SignatureTest.all.filter(_ != "class"),
-  sourceFiles = List("inheritedMembers1", "inheritedMembers2"))
+  sourceFiles = List("inheritedMembers1", "inheritedMembers2"))
+
+class ComplexNames extends SignatureTest("complexNames", Seq("def"))