Fix an issue where empty lines were added between comments inside dec…

…orators.
psf · Oct 7, 2022 · 524cc6b · 524cc6b
1 parent 3318fd5
commit 524cc6b
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Showing 2 changed files with 4 additions and 0 deletions.
diff --git a/src/black/lines.py b/src/black/lines.py
@@ -513,6 +513,8 @@ def maybe_empty_lines(self, current_line: Line) -> LinesBlock:
         if current_line.is_comment:
             if self.previous_line is None or (
                 not self.previous_line.is_decorator
+                # `or before` means this comment already has an empty line before
+                and (not self.previous_line.is_comment or before)
                 and (self.semantic_leading_comment is None or before)
             ):
                 self.semantic_leading_comment = block

diff --git a/tests/data/preview/comments9.py b/tests/data/preview/comments9.py
@@ -37,6 +37,7 @@ class MyClassAfterAnotherClassWithDocstring:
 # leading 1
 @deco1
 # leading 2
+# leading 2 extra
 @deco2(with_args=True)
 # leading 3
 @deco3
@@ -158,6 +159,7 @@ class MyClassAfterAnotherClassWithDocstring:
 # leading 1
 @deco1
 # leading 2
+# leading 2 extra
 @deco2(with_args=True)
 # leading 3
 @deco3