Apply suggestions from code review

Author: baywet

versions/1.1.0-dev.md

@@ -122,16 +122,16 @@ The result of the `target` JSONPath expression MUST be zero or more objects or a
 
 To update a primitive property value such as a string, the `target` expression should select the _containing_ object in the target document and `update` should contain an object with the property and its new primitive value.
 
-Primitive-valued items of an array cannot be replaced or removed individually, only the complete array can be replaced with a `remove` action followed by an `update` action.
+Primitive-valued items of an array cannot be replaced or removed individually, only the complete array can be replaced with a `remove` action followed by an `update` or `copy` action.
 
-The properties of the `update` object MUST be compatible with the target object referenced by the JSONPath key. When the Overlay document is applied, the `update` object is merged with the target object by recursively applying these steps:
+The properties of the `update` or `copy` object MUST be compatible with the target object referenced by the JSONPath key. When the Overlay document is applied, the `update` object is merged with the target object by recursively applying these steps:
 
 - A property that only exists in the target object is left unchanged.
-- A property that only exists in the `update` object is inserted into the target object.
-- If a property exists in both `update` and target object:
-  - A primitive value of the `update` property replaces a primitive value of the target property.
-  - An array value of the `update` property is concatenated with an array value of the target property.
-  - An object value of the `update` property is recursively merged with an object value of the target property.
+- A property that only exists in the `update` or `copy` object is inserted into the target object.
+- If a property exists in both `update` or `copy` and target object:
+  - A primitive value of the `update` or `copy` property replaces a primitive value of the target property.
+  - An array value of the `update` or `copy` property is concatenated with an array value of the target property.
+  - An object value of the `update` or `copy` property is recursively merged with an object value of the target property.
   - Other property value combinations are incompatible and result in an error.
 
 This object MAY be extended with [Specification Extensions](#specification-extensions).