Improve clarity of expression

python · AA-Turner · May 1, 2025 · Feb 16, 2025 · Feb 16, 2025 · Feb 16, 2025
commit 60951fb01250ea8f1017e205425866407a215723
diff --git a/Lib/difflib.py b/Lib/difflib.py
@@ -1053,7 +1053,7 @@ def IS_LINE_JUNK(line, pat=None):
    """

    if pat is None:
-        return line.strip() in '#'
+        return line.strip() in {'', '#'}
    return pat(line) is not None

 def IS_CHARACTER_JUNK(ch, ws=" \t"):