**Added:**

* <news item>

**Changed:**

* ptk key binding for TAB -- hitting TAB to start completion now automatically selects the first displayed completion (if any).
  hitting TAB when in insert mode inserts TAB, as heretofore.  This more exactly follows behavior of readline ``menu-complete``.
  There is no configuration option for tailoring this behavior.

**Deprecated:**

* <news item>

**Removed:**

* <news item>

**Fixed:**

* <news item>

**Security:**

* <news item>