Add a comment since the if expression is a bit hard to understand

psf · May 15, 2021 · 004cdd8 · 004cdd8
1 parent c8d894f
commit 004cdd8
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/black/files.py b/src/black/files.py
@@ -204,6 +204,8 @@ def gen_python_files(
             continue
 
         if child.is_dir():
+            # If gitignore is None, gitignore usage is disabled, while a Falsey
+            # gitignore is when the directory doesn't have a .gitignore file.
             yield from gen_python_files(
                 child.iterdir(),
                 root,