Module sentence_utils 

Sentence detection utilities

This module provides shared functionality for detecting sentence boundaries in markdown text. Used by both text reflow (MD013) and the multiple spaces rule (MD064).

Features:

• Common abbreviation detection (Mr., Dr., Prof., etc.)
• CJK punctuation support (。, ！, ？)
• Closing quote detection (straight and curly)
• Both forward-looking (reflow) and backward-looking (MD064) sentence detection

Constants

DEFAULT_ABBREVIATIONS

Default abbreviations that should NOT be treated as sentence endings.

Functions

get_abbreviations

Get the effective abbreviations set based on custom additions All abbreviations are normalized to lowercase for case-insensitive matching Custom abbreviations are always merged with built-in defaults

is_after_sentence_ending

Check if multiple spaces occur immediately after sentence-ending punctuation. This is a backward-looking check used by MD064.

is_after_sentence_ending_with_abbreviations

Check if multiple spaces occur immediately after sentence-ending punctuation, with a custom abbreviations set.

is_cjk_char

Check if a character is a CJK character (Chinese, Japanese, Korean)

is_cjk_sentence_ending

Check if a character is CJK sentence-ending punctuation These include: 。(ideographic full stop), ！(fullwidth exclamation), ？(fullwidth question)

is_closing_quote

Check if a character is a closing quote mark Includes straight quotes and curly/smart quotes

is_opening_quote

Check if a character is an opening quote mark Includes straight quotes and curly/smart quotes

is_sentence_ending_punctuation

Check if a character is sentence-ending punctuation (ASCII or CJK)

is_trailing_close_punctuation

Check if a character is closing punctuation that can follow sentence-ending punctuation This includes closing quotes, parentheses, and brackets

text_ends_with_abbreviation

Check if text ends with a common abbreviation followed by a period