[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

testing/test_gateway.py

@@ -661,13 +661,11 @@ def test_concurrent_rinfo(execmodel: gateway_base.ExecModel) -> None:
     sleep_time = 1.5 if execmodel.backend == "main_thread_only" else 0.5
     try:
         ch = gw.remote_exec(
-            """
+            f"""
                 import os, time
                 time.sleep({sleep_time})
                 channel.send(os.getpid())
-        """.format(
-                sleep_time=sleep_time
-            )
+        """
         )
         if execmodel.backend == "main_thread_only":
             assert hasattr(gw, "_cache_rinfo")