adds a check using regex to remove delimiters if they are returned by…

… the LLM

prospector/llm/llm_service.py

@@ -1,3 +1,5 @@
+import re
+
 import validators
 from langchain_core.language_models.llms import LLM
 from langchain_core.output_parsers import StrOutputParser
@@ -59,6 +61,12 @@ def get_repository_url(self, advisory_description, advisory_references) -> str:
             )
             logger.info(f"LLM returned the following URL: {url}")
 
+            # delimiters are often returned by the LLM, remove them, if the case
+            pattern = r"<output>\s*(https?://[^\s]+)\s*</output>"
+            match = re.search(pattern, url)
+            if match:
+                return match.group(1)
+
             if not validators.url(url):
                 raise TypeError(f"LLM returned invalid URL: {url}")