Lots of cleanups to get stacks properly working in all cases.

tests/ExceptionTests.cpp

@@ -11,7 +11,8 @@ TEST_CASE("Throw exception get stack trace") {
     } catch (const ArbUt::Exception& e) {
         REQUIRE(e.GetStacktrace(1) ==
                 "Stacktrace with depth 1: \n"
-                "ExceptionTests.cpp[6] static void Thrower() { throw ArbUt::Exception(\"foobar\"); }\n");
+                "ExceptionTests.cpp[6] static void Thrower() { throw ArbUt::Exception(\"foobar\"); }\n"
+                "--- End of Stack ---");
     }
 }