Add example with two context managers in a single with statement

Author: windelbouwman

tests/snippets/with.py

@@ -1,5 +1,4 @@
 
-ls = []
 
 class ContextManager:
     def __enter__(self):
@@ -15,24 +14,29 @@ def __str__(self):
         ls.append(3)
         return "c'est moi!"
 
+ls = []
 with ContextManager() as c:
     print(c)
-
 assert ls == [1, 3, 2]
 
-ls = []
 class ContextManager2:
     def __enter__(self):
-        print('Entrada')
-        ls.append(1)
+        print('Ni hau')
+        ls.append(4)
         return ls
 
     def __exit__(self, exc_type, exc_val, exc_tb):
-        ls.append(2)
-        print('Wiedersehen')
+        ls.append(5)
+        print('Ajuus')
 
+ls = []
 with ContextManager2() as c:
     print(c)
-    assert c == [1]
+    assert c == [4]
+assert ls == [4, 5]
 
-assert ls == [1, 2]
+ls = []
+with ContextManager() as c1, ContextManager2() as c2:
+    print(c1)
+    assert c2 == [1, 4, 3]
+assert ls == [1, 4, 3, 5, 2]