added 2 more output tests

tests/test_0.py

@@ -4,3 +4,17 @@ def test_1(capsys):
     import svar_0_1
     captured = capsys.readouterr()
     assert captured.out == answer_1
+
+answer_2 = 'Is there anybody in there?\n'
+
+def test_2(capsys):
+    import svar_0_2
+    captured = capsys.readouterr()
+    assert captured.out == answer_2
+
+answer_3 = 'Is there anyone at home?\n'
+
+def test_3(capsys):
+    import svar_0_3
+    captured = capsys.readouterr()
+    assert captured.out == answer_3