Improve StringVar handling to prevent leading slashes

- Add additional string_replace_operation to strip any remaining leading slashes
- Ensures StringVar branch returns clean path without leading slash
- Prevents double slash in GitHub URLs when combined with main/{path}
- Addresses issue where regex ^/+|/+$ might not fully strip leading slashes in StringVar context

Co-Authored-By: [email protected] <[email protected]>

Author: devin-ai-integration[bot]

pcweb/templates/docpage/docpage.py

@@ -288,7 +288,8 @@ def convert_url_path_to_github_path(url_path) -> str:
 
         path_no_slashes = string_replace_operation(url_path, r"^/+|/+$", "")
         path_with_underscores = string_replace_operation(path_no_slashes, "-", "_")
-        return f"{path_with_underscores}.md"
+        path_clean = string_replace_operation(path_with_underscores, r"^/+", "")
+        return f"{path_clean}.md"
     else:
         path = url_path.strip("/")
         path = path.replace("-", "_")