refactor(knowledge-base mcp server): adjust formatting for consistency and readability

Improved code formatting, line breaks, and indentation across chunking logic and multiple test modules to enhance code clarity and maintain consistent style. No functional changes made.

mcp-servers/knowledge-base/chunking/code.py

@@ -151,7 +151,7 @@ class CodeChunker(BaseChunker):
         for struct_type, pattern in patterns.items():
             for match in pattern.finditer(content):
                 # Convert character position to line number
-                line_num = content[:match.start()].count("\n")
+                line_num = content[: match.start()].count("\n")
                 boundaries.append((line_num, struct_type))
 
         if not boundaries: