indent: make dedent selected environment more robust

[tdegeus]

texplain/texplain/__init__.py

Lines 964 to 996 in dae4e21

	def _dedent(text: str, partial: list[PlaceholderType]) -> str:
	"""
	Remove indentation.
	:param text: Text.
	:param partial:
	List of :py:class:`PlaceholderType` to dedent partially.
	If the number of lines is less than 3, ``textwrap.dedent`` is applied to all lines.
	Otherwise, ``textwrap.dedent`` is applied to ``lines[1:-1]``;
	the first and last lines are stripped.
	:return: Formatted text.
	"""
	text, placholders = text_to_placeholders(text, partial, base="TEXDEDENT")
	text = _lstrip_lines(text)
	# keep common indentation table
	# TODO: make more clever
	for placeholder in placholders:
	tmp = placeholder.content.splitlines()
	if len(tmp) <= 2:
	placeholder.content = "\n".join(textwrap.dedent(tmp))
	else:
	placeholder.content = "\n".join(
	[tmp[0].lstrip(), textwrap.dedent("\n".join(tmp[1:-1])), tmp[-1].lstrip()]
	)
	placeholder.space_front = "\n"
	text = text_from_placeholders(text, placholders)
	return text

[tdegeus]

Fixed by #68