README.md in chop-0.21.0 vs README.md in chop-0.22.0

@@ -37,9 +37,10 @@
 * `#files`: Replaces a space-delimited list of file paths with an array of file handles. Looks in `features/support/fixtures` by default.
 * `#has_one/#belongs_to`: Replaces an entity name with that entity. Uses `.find_by_name` by default.
 * `#has_many`: Replaces a comma-delimited list of entity names with an array of those entities. Uses `.find_by_name` by default.
 * `#underscore_keys`: Converts all hash keys to underscored versions.
 * `#default`: Provides a default value for a given field.
+* `#copy`: Copies the value of one or more fields.
 * `#rename`: Renames one or more fields.
 * `#delete`: Deletes one or more fields.
 
 All these methods are implemented in terms of the following low-level methods, useful for when you need more control over the transformation:
 * `#field`: performs transformations on a specific field value.