Don't put four empty lines between top-level functions split by a comment

README.md

@@ -269,6 +269,9 @@ More details can be found in [CONTRIBUTING](CONTRIBUTING.md).
 
 * remove a trailing comma if there is a single argument to a call
 
+* if top level functions were separated by a comment, don't put four
+  empty lines after the upper function
+
 * fixed missing space in numpy-style array indexing (#33)
 
 * fixed spurious space after star-based unary expressions (#31)

black.py

@@ -628,6 +628,10 @@ def maybe_empty_lines(self, current_line: Line) -> Tuple[int, int]:
         (two on module-level), as well as providing an extra empty line after flow
         control keywords to make them more prominent.
         """
+        if current_line.is_comment:
+            # Don't count standalone comments towards previous empty lines.
+            return 0, 0
+
         before, after = self._maybe_empty_lines(current_line)
         self.previous_after = after
         self.previous_line = current_line