fix: correct docstring formatting in Gemma4ReasoningParser

- Updated the docstring to use raw string notation for better handling of escape sequences.
- Adjusted the line break in the example to ensure proper formatting.

Author: cubist38

app/parsers/gemma4.py

@@ -132,10 +132,10 @@ def _parse_tool_call_body(body: str) -> dict | None:
 
 
 class Gemma4ReasoningParser(AbstractReasoningParser):
-    """Reasoning parser for Gemma 4 models.
+    r"""Reasoning parser for Gemma 4 models.
 
     Thinking content is wrapped in:
-        <|channel>thought\\n ... <channel|>
+        <|channel>thought\n ... <channel|>
     """
 
     def __init__(