Move tests in basic/tests/ up one level preparating to multiple test dirs.

tests/basics/class2.py

@@ -0,0 +1,17 @@
+# class with __init__
+
+class C1:
+    def __init__(self):
+        self.x = 1
+
+c1 = C1()
+print(type(c1) == C1)
+print(c1.x)
+
+class C2:
+    def __init__(self, x):
+        self.x = x
+
+c2 = C2(4)
+print(type(c2) == C2)
+print(c2.x)