Remove annoying warning

[Kiuh]

User description

When use domonic, first import emits warning with new python version.

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PR Type

Bug fix

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Description

• Fix regex pattern to use raw string literal

• Resolve Python deprecation warning for invalid escape sequence

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Diagram Walkthrough

flowchart LR
  A["Regex pattern with escape sequence"] --> B["Raw string literal"] 
  B --> C["Warning resolved"]

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File Walkthrough

	Relevant files
Bug fix	dom.py Fix regex escape sequence warning                                                domonic/dom.py Convert regex pattern string to raw string literal Fix invalid escape sequence warning in class name matching +1/-1

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[qodo-merge-pro]

PR Reviewer Guide 🔍

Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Regex Robustness The regex concatenates user-provided class names without escaping. Class names with regex metacharacters (e.g., '+', '.', '[]') will alter matching. Consider wrapping class_name with re.escape() to ensure literal matching. r"(^|\s)" + class_name + r"(\s|$)", fnd.getAttribute("class") ): Word Boundary Accuracy Using (\s|$) may miss cases with non-space separators or multiple spaces; consider splitting the class attribute on whitespace and comparing tokens, or using a more precise regex like r'(?:(?<=^)|(?<=\s))' and r'(?=\s|$)'. Token-based comparison is simpler and faster. r"(^|\s)" + class_name + r"(\s|$)", fnd.getAttribute("class") ):

[qodo-merge-pro]

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
Possible issue	Escape user-supplied regex input Escape class_name before interpolating it into the regex to avoid unintended regex metacharacter interpretation and potential ReDoS on crafted inputs. Use re.escape around class_name to ensure literal matching of class names. domonic/dom.py [2210-2213] if fnd.getAttribute("class") and re.search( - r"(^|\s)" + class_name + r"(\s|$)", fnd.getAttribute("class") + r"(^|\s)" + re.escape(class_name) + r"(\s|$)", fnd.getAttribute("class") ): context.append(fnd) Apply / Chat Suggestion importance[1-10]: 9 __ Why: The suggestion correctly identifies a potential security vulnerability (ReDoS) and correctness issue where class_name, which can contain user-controlled characters, is not escaped before being used in a regular expression.	High
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