Add better docs around authors mapping CSV.

diff --git a/php/commands/import.php b/php/commands/import.php
index 451db0e..36d2c46 100644 (file)
--- a/php/commands/import.php
+++ b/php/commands/import.php
@@ -11,7 +11,7 @@ class Import_Command extends WP_CLI_Command {
         * : Path to one or more valid WXR files for importing.
         *
         * --authors=<authors>
-        * : How the author mapping should be handled. Options are 'create', 'mapping.csv', or 'skip'. The first will create any non-existent users from the WXR file. The second will read author mapping associations from a CSV, or create a CSV for editing if the file path doesn't exist. The last option will skip any author mapping.
+        * : How the author mapping should be handled. Options are 'create', 'mapping.csv', or 'skip'. The first will create any non-existent users from the WXR file. The second will read author mapping associations from a CSV, or create a CSV for editing if the file path doesn't exist. The CSV requires two columns, and a header row like "old_user_login,new_user_login". The last option will skip any author mapping.
         *
         * [--skip=<data-type>]
         * : Skip importing specific data. Supported options are: 'attachment' and 'image_resize' (skip time-consuming thumbnail generation).