More cleanup.

1 files changed, 3 insertions, 1 deletions

diff --git a/exec_utils.py b/exec_utils.py
index df27335..a440de5 100644
--- a/exec_utils.py
+++ b/exec_utils.py
@@ -1,5 +1,7 @@
 #!/usr/bin/env python3
 
+"""Helper methods concerned with executing subprocesses."""
+
 import atexit
 import logging
 import os
@@ -137,7 +139,7 @@ def cmd_in_background(command: str, *, silent: bool = False) -> subprocess.Popen
     def kill_subproc() -> None:
         try:
             if subproc.poll() is None:
-                logger.info(f'At exit handler: killing {subproc} ({command})')
+                logger.info('At exit handler: killing %s (%s)', subproc, command)
                 subproc.terminate()
                 subproc.wait(timeout=10.0)
         except BaseException as be: