"for files which may be edited online.</li>");
    CX("<li>Committing edits creates a new commit record with a single "
       "modified file.</li>");
    CX("<li>\"Delta manifests\" (see the checkbox on the Commit tab) "
       "make for smaller commit records, especially in repositories "
       "with many files.</li>");
    CX("<li>The file selector allows, for usability's sake, only files "
       "in leaf check-ins to be selected, but files may be edited via "
       "non-leaf check-ins by passing them as the <code>filename</code> "
       "and <code>checkin</code> URL arguments to this page.</li>");
    CX("<li>The editor stores some number of local edits in one of "
       "<code>window.fileStorage</code> or "
       "<code>window.sessionStorage</code>, if able, but which storage "
       "is unspecified and may differ across environments. When "
       "committing or force-reloading a file, local edits to that "
       "file/check-in combination are discarded.</li>");
    CX("</ul>");
  }
  CX("</div>"/*#fileedit-tab-help*/);

  {
    /* Dynamically populate the editor, display any error in the err
    ** blob, and/or switch to tab #0, where the file selector