fix mypy

Author: PatrickHuembeli

src/axiomatic/client.py

@@ -50,10 +50,10 @@ def analyze_equations(
         elif url_path:
             if "arxiv" in url_path and "abs" in url_path:
                 url_path = url_path.replace("abs", "pdf")
-            file = requests.get(url_path)
+            url_file = requests.get(url_path)
             from io import BytesIO
-            pdf_file = BytesIO(file.content) # type: ignore [assignment]
-            response = self._ax_client.document.equation.from_pdf(document=pdf_file)
+            pdf_stream = BytesIO(url_file.content)
+            response = self._ax_client.document.equation.from_pdf(document=pdf_stream)
 
         elif parsed_paper:
             response = EquationExtractionResponse.model_validate(