f add tick

Author: TheBlueMatt

pending_changelog/matt-idempotent-payments.txt

@@ -1,7 +1,7 @@
 API Changes
 ===========
 
- * Payment sending methods now take an explicit PaymentId, which acts as an
+ * Payment sending methods now take an explicit `PaymentId`, which acts as an
    idempotency token. You may simply use the PaymentHash for this (#XXXX).
  * Pending outbound payments are no longer automatically timed-out a few blocks
    after failure. Thus, in order to avoid leaking memory, you MUST call