,

Author: benjie

spec/Section 4 -- Introspection.md

@@ -119,7 +119,7 @@ warnings.
 
 **Ordering**
 
-When possible implementations should preserve observable order for unordered
+When possible, implementations should preserve observable order for unordered
 data collections. For example, if a schema was produced from a source
 {TypeSystemDocument} then introspection of fields, input fields, arguments, enum
 values, directives, union members, implemented interfaces and so on should