Crash with line-length 6 and multi-line docstring #3427
Description
def x():
"""first line----------------------------------------------------------------------
second line----------------------------------------------------------------------"""Crashes with Black 22.12.0:
% black --preview --diff tests/data/preview/docstring_preview.py -l 6
error: cannot format tests/data/preview/docstring_preview.py: INTERNAL ERROR: Black produced different code on the second pass of the formatter. Please report a bug on https://github.com/psf/black/issues. This diff might be helpful: /var/folders/3b/k964cnv10097wzj3h7w07fww0000gp/T/blk_la0pkiyv.log
Oh no! 💥 💔 💥
1 file would fail to reformat.
% cat /var/folders/3b/k964cnv10097wzj3h7w07fww0000gp/T/blk_la0pkiyv.log
Mode(target_versions={<TargetVersion.PY38: 8>, <TargetVersion.PY37: 7>}, line_length=6, string_normalization=True, is_pyi=False, is_ipynb=False, skip_source_first_line=False, magic_trailing_comma=True, experimental_string_processing=False, python_cell_magics=set(), preview=True)
--- source
+++ first pass
@@ -1,4 +1,6 @@
def x():
"""first line----------------------------------------------------------------------
- second line----------------------------------------------------------------------"""
+ second line----------------------------------------------------------------------
+
+ """
--- first pass
+++ second pass
@@ -1,6 +1,7 @@
def x():
"""first line----------------------------------------------------------------------
second line----------------------------------------------------------------------
+
"""
I guess this stops crashing at line-length 7 because then """ (one level of indent plus trailing quotes) fits in a line.