avoid race condition for most filenames

SC2045.md

@@ -14,7 +14,7 @@ done
 ```sh
 for f in *.wav
 do
-  [[ -e "$f" ]] || break  # handle the case of no *.wav files
+  [[ "$f" == '*.wav' && -e "$f" ]] || break  # handle the case of no *.wav files
   echo "$f"
 done
 ```