style: fix ruff import order and line length in test_observable batch 3

Pre-commit hook failures from PR #785:
- Reorder `from typing import NoReturn` after `from datetime` in 3 files
- Wrap two long lines exceeding 88 chars in test_fromiterable.py and
  test_minby.py

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: dbrattli

tests/test_observable/test_delay.py

@@ -1,7 +1,7 @@
 import logging
 import unittest
-from typing import NoReturn
 from datetime import datetime, timezone
+from typing import NoReturn
 
 from reactivex.operators import delay
 from reactivex.testing import ReactiveTest, TestScheduler

tests/test_observable/test_fromiterable.py

@@ -72,4 +72,6 @@ def test_double_subscribe_to_iterable(self):
 
     def test_observer_throws(self):
         with self.assertRaises(RxException):
-            reactivex.from_iterable([1, 2, 3]).subscribe(lambda x: _raise(Exception("ex")))
+            reactivex.from_iterable([1, 2, 3]).subscribe(
+                lambda x: _raise(Exception("ex"))
+            )

tests/test_observable/test_minby.py

@@ -279,7 +279,9 @@ def reverse_comparer(a, b):
         xs = scheduler.create_hot_observable(msgs)
 
         def create():
-            return xs.pipe(ops.min_by(lambda x: _raise(Exception(ex)), reverse_comparer))
+            return xs.pipe(
+                ops.min_by(lambda x: _raise(Exception(ex)), reverse_comparer)
+            )
 
         res = scheduler.start(create=create).messages
         assert res == [on_error(210, ex)]

tests/test_observable/test_takeuntilwithtime.py

@@ -1,6 +1,6 @@
 import unittest
-from typing import NoReturn
 from datetime import datetime, timezone
+from typing import NoReturn
 
 from reactivex import operators as ops
 from reactivex.testing import ReactiveTest, TestScheduler

tests/test_observable/test_timeout.py

@@ -1,6 +1,6 @@
 import unittest
-from typing import NoReturn
 from datetime import datetime, timezone
+from typing import NoReturn
 
 from reactivex import operators as ops
 from reactivex.testing import ReactiveTest, TestScheduler