GH-103805: Lib test f541 linting issue fix (#103812)

This PR makes some minor linting adjustments to the Lib/test module
caught by [ruff](https://github.com/charliermarsh/ruff). The adjustments
are all related to the `F541 f-string without any placeholders` issue.

Issue: https://github.com/python/cpython/issues/103805

<!-- gh-issue-number: gh-103805 -->
* Issue: gh-103805
<!-- /gh-issue-number -->

---------

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Gregory P. Smith <greg@krypto.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/Lib/test/test_coroutines.py b/Lib/test/test_coroutines.py
index 6ab19ef..4714578 100644
--- a/Lib/test/test_coroutines.py
+++ b/Lib/test/test_coroutines.py
@@ -2365,15 +2365,15 @@ class OriginTrackingTest(unittest.TestCase):
                 f"coroutine '{corofn.__qualname__}' was never awaited\n",
                 "Coroutine created at (most recent call last)\n",
                 f'  File "{a1_filename}", line {a1_lineno}, in a1\n',
-                f'    return corofn()  # comment in a1',
+                "    return corofn()  # comment in a1",
             ]))
             check(2, "".join([
                 f"coroutine '{corofn.__qualname__}' was never awaited\n",
                 "Coroutine created at (most recent call last)\n",
                 f'  File "{a2_filename}", line {a2_lineno}, in a2\n',
-                f'    return a1()  # comment in a2\n',
+                "    return a1()  # comment in a2\n",
                 f'  File "{a1_filename}", line {a1_lineno}, in a1\n',
-                f'    return corofn()  # comment in a1',
+                "    return corofn()  # comment in a1",
             ]))
 
         finally: