docstring

Author: willmcgugan

tests/snapshot_tests/test_snapshots.py

@@ -4629,6 +4629,10 @@ def compose(self) -> ComposeResult:
 
 
 def test_long_textarea_placeholder(snap_compare) -> None:
+    """Test multi-line placeholders are wrapped and rendered.
+
+    You should see a TextArea at 50% width, with several lines of wrapped text.
+    """
 
     TEXT = """I must not fear.
 Fear is the mind-killer.