X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/4c4a51cb6bd01e2e813354502b8327285fc00e75..b65af236cfd3c89938e3ddd012a5772d94826d84:/black.py

diff --git a/black.py b/black.py
index ada9b0e..f6f687b 100644
--- a/black.py
+++ b/black.py
@@ -2601,9 +2601,11 @@ def bracket_split_build_line(
             # Since body is a new indent level, remove spurious leading whitespace.
             normalize_prefix(leaves[0], inside_brackets=True)
             # Ensure a trailing comma for imports and standalone function arguments, but
-            # be careful not to add one after any comments.
-            no_commas = original.is_def and not any(
-                l.type == token.COMMA for l in leaves
+            # be careful not to add one after any comments or within type annotations.
+            no_commas = (
+                original.is_def
+                and opening_bracket.value == "("
+                and not any(l.type == token.COMMA for l in leaves)
             )
 
             if original.is_import or no_commas:
@@ -3778,8 +3780,10 @@ def dump_to_file(*output: str) -> str:
 
 @contextmanager
 def nullcontext() -> Iterator[None]:
-    """Return context manager that does nothing.
-    Similar to `nullcontext` from python 3.7"""
+    """Return an empty context manager.
+
+    To be used like `nullcontext` in Python 3.7.
+    """
     yield