Add 'trigger(KEY_OR_EVENT[,...])' action

man/man1/fzf.1

@@ -1817,6 +1817,7 @@ A key or an event can be bound to one or more of the following actions.
     \fBtransform\-prompt(...)\fR        (transform prompt string using an external command)
     \fBtransform\-query(...)\fR         (transform query string using an external command)
     \fBtransform\-search(...)\fR        (trigger fzf search with the output of an external command)
+    \fBtrigger(...)\fR                 (trigger actions bound to a comma-separated list of keys and events)
     \fBunbind(...)\fR                  (unbind bindings)
     \fBunix\-line\-discard\fR            \fIctrl\-u\fR
     \fBunix\-word\-rubout\fR             \fIctrl\-w\fR