update tests

Author: ivanharvard

tests/check50_tests.py

@@ -99,8 +99,8 @@ def test_with_empty_file(self):
         process.expect_exact("foo.py exists")
         process.expect_exact(":(")
         process.expect_exact("prints hello")
-        process.expect_exact("expected: \"hello\"")
-        process.expect_exact("actual:   \"\"")
+        process.expect_exact("expected: 'hello'")
+        process.expect_exact("actual:   ''")
         process.close(force=True)
 
 
@@ -146,8 +146,8 @@ def test_with_empty_file(self):
         process.expect_exact("foo.py exists")
         process.expect_exact(":(")
         process.expect_exact("prints hello name")
-        process.expect_exact("expected: \"hello bar\"")
-        process.expect_exact("actual:   \"\"")
+        process.expect_exact("expected: 'hello bar'")
+        process.expect_exact("actual:   ''")
         process.close(force=True)
 
     def test_with_correct_file(self):