* @param[in] ctx To allocate value boxes and values in.
* @param[out] out Where to write the result of the expansion.
* @param[in] request The current request.
+ * @param[in] xlat to evaluate.
* @param[in] callback to call on unlang_resumable().
* @param[in] signal_callback to call on unlang_action().
* @param[in] uctx to pass to the callbacks.
* Once evaluation is complete, the caller
* should call us with the same #xlat_exp_t and the
* result of the nested evaluation in result.
- * @param[in,out] whether we processed an alternate.
+ * @param[in,out] alternate Whether we processed, or have previously processed
+ * the alternate.
* @param[in] request the current request.
* @param[in,out] in xlat node to evaluate. Advanced as we process
* additional #xlat_exp_t.