update docstring

app/api/routers/route_factory.py

@@ -6,12 +6,13 @@
 def create_get_instances_handler(
     data_element_uri: str, external_vocab: str | None
 ):
-    """
-    When a GET request is sent, return a dict with the only key corresponding to the controlled term of a neurobagel class,
-    and the value being a list of dictionaries each corresponding to an available class instance term from the graph.
-    """
+    """Create the handler function (path function) for the root `/` path of an attribute router."""
 
     async def get_instances(request: Request):
+        """
+        When a GET request is sent, return a dict with the only key corresponding to the controlled term of a neurobagel class,
+        and the value being a list of dictionaries each corresponding to an available class instance term from the graph.
+        """
         term_labels_path = (
             request.app.state.vocab_lookup_paths[external_vocab]
             if external_vocab is not None
@@ -23,9 +24,13 @@ async def get_instances(request: Request):
 
 
 def create_get_vocab_handler(external_vocab: str, vocab_name: str):
-    """When a GET request is sent, return a dict containing the name, namespace info, and all term ID-label mappings for the vocabulary of the specified variable."""
+    """Create the handler function (path function) for the `/vocab` endpoint of an attribute router."""
 
     async def get_vocab(request: Request):
+        """
+        When a GET request is sent, return a dict containing the name, namespace info,
+        and all term ID-label mappings for the vocabulary of the specified variable.
+        """
         return await crud.get_term_labels_for_vocab(
             term_labels_path=request.app.state.vocab_lookup_paths[
                 external_vocab