Template:Assistant:Add action-test/add-entry/preview/doc

Usage
Inputs:
 * &mdash; the full page name of the test table to which an entry is to be added.
 * &mdash; the raw content of the test table page.
 * &mdash; the full name of the test page to be added to the table; needn't exist.
 * &mdash; description of the test page for use in the table.

Function:
 * Provides a preview of the table via and offers button to commit or return to .  The preview is actually generated at  since dialog/init has to appear directly on the displayed page.