Fix a variable typo by switching to a f-string.
diff --git a/Tools/scripts/pyvenv b/Tools/scripts/pyvenv
index 1eed3ff..1fb42c6 100755
--- a/Tools/scripts/pyvenv
+++ b/Tools/scripts/pyvenv
@@ -5,7 +5,7 @@
 
     executable = pathlib.Path(sys.executable or 'python3').name
     print('WARNING: the pyenv script is deprecated in favour of '
-          '`{} -m venv`'.format(exeutable), file=sys.stderr)
+          f'`{executable} -m venv`', file=sys.stderr)
 
     rc = 1
     try: