Make 'Field Selections' header stable (#773)

benjie · web-flow · commit 73fc59385f5b · 2020-09-03T12:08:49.000+03:00
diff --git a/spec/Section 5 -- Validation.md b/spec/Section 5 -- Validation.md
@@ -324,7 +324,9 @@ must provide the operation name as described in {GetOperation()}.
 
 ## Fields
 
-### Field Selections on Objects, Interfaces, and Unions Types
+### Field Selections
+
+Field selections must exist on Object, Interface, and Union types.
 
 **Formal Specification**
 
