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fix(gateway): fix underscore-stripping regex to preserve snake_case identifiers

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The blanket _(.+?)_ and __(.+?)__ patterns incorrectly consumed
snake_case identifiers like send_as_bot and user_id.  Add
lookbehind/lookahead boundaries so underscores adjacent to
alphanumeric characters are not treated as markdown formatting.

Same fix already applied and tested in the CLI renderer; this
addresses the gateway/platforms/helpers.py copy.

Supersedes #15076.
This commit is contained in:
Tranquil-Flow 2026-04-25 09:55:22 +10:00
parent 00c3d848d8
commit 4eab312c35
2 changed files with 62 additions and 2 deletions
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4
gateway/platforms/helpers.py
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@ -157,8 +157,8 @@ class TextBatchAggregator:
# Pre-compiled regexes for performance
_RE_BOLD = re.compile(r"\*\*(.+?)\*\*", re.DOTALL)
_RE_ITALIC_STAR = re.compile(r"\*(.+?)\*", re.DOTALL)
_RE_BOLD_UNDER = re.compile(r"__(.+?)__", re.DOTALL)
_RE_ITALIC_UNDER = re.compile(r"_(.+?)_", re.DOTALL)
_RE_BOLD_UNDER = re.compile(r"(?<![a-zA-Z0-9])__(?=[^_\s])(.+?)(?<=[^_])__(?![a-zA-Z0-9])", re.DOTALL)
_RE_ITALIC_UNDER = re.compile(r"(?<![a-zA-Z0-9])_(?=[^_\s])(.+?)(?<=[^_])_(?![a-zA-Z0-9])", re.DOTALL)
_RE_CODE_BLOCK = re.compile(r"```[a-zA-Z0-9_+-]*\n?")
_RE_INLINE_CODE = re.compile(r"`(.+?)`")
_RE_HEADING = re.compile(r"^#{1,6}\s+", re.MULTILINE)