switch descriptor howto to return value annotation (GH-7796)
diff --git a/Doc/howto/descriptor.rst b/Doc/howto/descriptor.rst
index 6e4aa3e..7b00d94 100644
--- a/Doc/howto/descriptor.rst
+++ b/Doc/howto/descriptor.rst
@@ -48,11 +48,11 @@
Descriptor Protocol
-------------------
-``descr.__get__(self, obj, type=None) --> value``
+``descr.__get__(self, obj, type=None) -> value``
-``descr.__set__(self, obj, value) --> None``
+``descr.__set__(self, obj, value) -> None``
-``descr.__delete__(self, obj) --> None``
+``descr.__delete__(self, obj) -> None``
That is all there is to it. Define any of these methods and an object is
considered a descriptor and can override default behavior upon being looked up