restored erroneously deleted clause

Author: ben-allen

README.md

@@ -152,7 +152,7 @@ For each field `foo`, there is an option `fooDisplay` that is set to `"auto"` by
 
 #### Design
 
-Adding the locale in string format as a first argument.
+Adding the locale in string format as a first argument, or specifying a ranked list of locales as an array of string values.
 
 ### Display fractional values