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Do not put the closing quotes in a docstring on a separate line (#3430)

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Fixes #3320. Followup from #3044.
This commit is contained in:
Jelle Zijlstra 2022-12-12 20:56:38 -08:00 committed by GitHub
parent abd2b2556a
commit 7d062ecd5f
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3 changed files with 10 additions and 11 deletions
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2
CHANGES.md
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@ -15,6 +15,8 @@
<!-- Changes that affect Black's preview style -->
- Fix a crash in preview style with assert + parenthesized string (#3415)
- Do not put the closing quotes in a docstring on a separate line, even if the line is
too long (#3430)
### Configuration

13
src/black/linegen.py
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@ -389,19 +389,18 @@ def visit_STRING(self, leaf: Leaf) -> Iterator[Line]:
# We need to find the length of the last line of the docstring
# to find if we can add the closing quotes to the line without
# exceeding the maximum line length.
# If docstring is one line, then we need to add the length
# of the indent, prefix, and starting quotes. Ending quotes are
# handled later.
# If docstring is one line, we don't put the closing quotes on a
# separate line because it looks ugly (#3320).
lines = docstring.splitlines()
last_line_length = len(lines[-1]) if docstring else 0
if len(lines) == 1:
last_line_length += len(indent) + len(prefix) + quote_len
# If adding closing quotes would cause the last line to exceed
# the maximum line length then put a line break before the
# closing quotes
if last_line_length + quote_len > self.mode.line_length:
if (
len(lines) > 1
and last_line_length + quote_len > self.mode.line_length
):
leaf.value = prefix + quote + docstring + "\n" + indent + quote
else:
leaf.value = prefix + quote + docstring + quote

6
tests/data/preview/docstring_preview.py
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@ -54,13 +54,11 @@ def single_quote_docstring_over_line_limit2():
def docstring_almost_at_line_limit():
"""long docstring.................................................................
"""
"""long docstring................................................................."""
def docstring_almost_at_line_limit_with_prefix():
f"""long docstring................................................................
"""
f"""long docstring................................................................"""
def mulitline_docstring_almost_at_line_limit():