Fix crash on docstrings ending with "\ " (#2142)

[etc/vim.git] / src / black / __init__.py

diff --git a/src/black/__init__.py b/src/black/__init__.py
index 99afc7d3c507fe06d0f21a1f1f50ea4a4b0577ad..051de5d13df58bfe7c0b6b300cfe629da27018d9 100644 (file)
--- a/src/black/__init__.py
+++ b/src/black/__init__.py
@@ -2186,7 +2186,13 @@ class LineGenerator(Visitor[Line]):
                 if docstring[0] == quote_char:
                     docstring = " " + docstring
                 if docstring[-1] == quote_char:
-                    docstring = docstring + " "
+                    docstring += " "
+                if docstring[-1] == "\\":
+                    backslash_count = len(docstring) - len(docstring.rstrip("\\"))
+                    if backslash_count % 2:
+                        # Odd number of tailing backslashes, add some padding to
+                        # avoid escaping the closing string quote.
+                        docstring += " "
             else:
                 # Add some padding if the docstring is empty.
                 docstring = " "