fix: fix style, add comments

Author: juancarlospaco

postgrest/_async/request_builder.py

@@ -83,6 +83,7 @@ async def execute(self) -> APIResponse[_ReturnT]:
             else:
                 raise APIError(r.json())
         except (TimeoutException, NetworkError, ReadError) as e:
+            # Retry for request API calls.
             if self.attempt < self.max_retries:
                 self.attempt += 1
                 await self.execute()
@@ -141,6 +142,7 @@ async def execute(self) -> SingleAPIResponse[_ReturnT]:
             else:
                 raise APIError(r.json())
         except (TimeoutException, NetworkError, ReadError) as e:
+            # Retry for request API calls.
             if self.attempt < self.max_retries:
                 self.attempt += 1
                 await self.execute()