Fix #2097: Recognize type comments with spaces after # #4652
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Updated comment recognition functions (is_type_comment, is_type_ignore_comment, and helpers) to correctly identify type/ignore comments even when extra whitespace exists between '#' and 'type:'. This addresses the core recognition bug described in issue psf#2097 without implementing comment standardization. Includes test case and CHANGELOG entry. Also includes unrelated mypy fix for action/main.py.
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Fixes #2097
Description
Currently, Black fails to recognize
# type:and# type: ignorecomments if there's extra whitespace after the#(e.g.,# type:), as described in issue #2097. This can lead to these comments being treated as regular comments, potentially causing incorrect formatting or instability.This PR updates the comment recognition logic (
is_type_comment,is_type_ignore_comment, and helper functions likeis_type_comment_string/is_type_ignore_comment_string) to correctly handle this leading whitespace after the#. It allows comments like# type: valueand# type: ignoreto be correctly identified.As discussed in the issue thread, this change focuses only on fixing the recognition part of the bug and does not implement comment standardization (i.e., it doesn't reformat
# type:to# type:).Additionally, this PR includes a small fix for unrelated
mypyerrors ([import-untyped, unreachable]) encountered inaction/main.pywhich were required to pass local pre-commit checks.