♻ Strip empty whitespace from description extracted from docstrings (#2821)

Co-authored-by: Sebastián Ramírez <[email protected]>

fastapi/routing.py

@@ -409,7 +409,7 @@ class APIRoute(routing.Route):
         self.description = description or inspect.cleandoc(self.endpoint.__doc__ or "")
         # if a "form feed" character (page break) is found in the description text,
         # truncate description text to the content preceding the first "form feed"
-        self.description = self.description.split("\f")[0]
+        self.description = self.description.split("\f")[0].strip()
         response_fields = {}
         for additional_status_code, response in self.responses.items():
             assert isinstance(response, dict), "An additional response must be a dict"

tests/test_tutorial/test_path_operation_advanced_configurations/test_tutorial004.py

@@ -31,7 +31,7 @@ openapi_schema = {
                     },
                 },
                 "summary": "Create an item",
-                "description": "Create an item with all the information:\n\n- **name**: each item must have a name\n- **description**: a long description\n- **price**: required\n- **tax**: if the item doesn't have tax, you can omit this\n- **tags**: a set of unique tag strings for this item\n",
+                "description": "Create an item with all the information:\n\n- **name**: each item must have a name\n- **description**: a long description\n- **price**: required\n- **tax**: if the item doesn't have tax, you can omit this\n- **tags**: a set of unique tag strings for this item",
                 "operationId": "create_item_items__post",
                 "requestBody": {
                     "content": {