README: shorten concurrent flatten example

README.md

@@ -283,14 +283,8 @@ assert list(pair_then_odd_integers) == [0, 2, 4, 6, 8, 1, 3, 5, 7, 9]
 > Flattens `concurrency` iterables concurrently:
 
 ```python
-letters_mix: Stream[str] = Stream(
-    [
-        Stream(["a"] * 5).throttle(per_second=10),
-        Stream(["b"] * 5).throttle(per_second=10),
-        Stream(["c"] * 5).throttle(per_second=10),
-    ]
-).flatten(concurrency=2)
-assert list(letters_mix) == ['a', 'b', 'a', 'b', 'a', 'b', 'a', 'b', 'a', 'b', 'c', 'c', 'c', 'c', 'c']
+mix_of_0s_and_1s: Stream[int] = Stream([[0] * 4, [1] * 4]).flatten(concurrency=2)
+assert list(mix_of_0s_and_1s) == [0, 1, 0, 1, 0, 1, 0, 1]
 ```
 
 

tests/test_readme.py

@@ -150,30 +150,10 @@ def test_flatten_example(self) -> None:
         assert list(pair_then_odd_integers) == [0, 2, 4, 6, 8, 1, 3, 5, 7, 9]
 
     def test_concurrent_flatten_example(self) -> None:
-        letters_mix: Stream[str] = Stream(
-            [
-                Stream(["a"] * 5).throttle(per_second=10),
-                Stream(["b"] * 5).throttle(per_second=10),
-                Stream(["c"] * 5).throttle(per_second=10),
-            ]
-        ).flatten(concurrency=2)
-        assert list(letters_mix) == [
-            "a",
-            "b",
-            "a",
-            "b",
-            "a",
-            "b",
-            "a",
-            "b",
-            "a",
-            "b",
-            "c",
-            "c",
-            "c",
-            "c",
-            "c",
-        ]
+        mix_of_0s_and_1s: Stream[int] = Stream([[0] * 4, [1] * 4]).flatten(
+            concurrency=2
+        )
+        assert list(mix_of_0s_and_1s) == [0, 1, 0, 1, 0, 1, 0, 1]
 
     def test_catch_example(self) -> None:
         inverses: Stream[float] = integers.map(lambda n: round(1 / n, 2)).catch(