STY: f-str -> format (readability)

Author: jond01

nibabel/cmdline/dicomfs.py

@@ -196,8 +196,8 @@ def release(self, path, flags, fh):
 def get_opt_parser():
     # use module docstring for help output
     p = OptionParser(
-        usage=f"{os.path.basename(sys.argv[0])} [OPTIONS] "
-              f"<DIRECTORY CONTAINING DICOMSs> <mount point>",
+        usage="{} [OPTIONS] <DIRECTORY CONTAINING DICOMSs> <mount point>".format(
+            os.path.basename(sys.argv[0])),
         version="%prog " + nib.__version__)
 
     p.add_options([