there are thousands of references regarding telegraphing the next part of an effect, as its one of the fundiments of magic.
Ammar probably has soemthing to say about it in his writings.
Its probably in vernon, ect too. but... You have to apreceate that this rule has nothing what so ever to do with the "philosophy" of magic .
Its just good old plain common sense that you never, ever tell people whats going to happen, before it happens, because if it doesnt happen, you will have no outs.
the audience will see that you have screwed up.
now sometimes, the magician can use false telegraphing techniques.
this is a form of misdirection that is most usefull in sucker, or comedy effects. The audience thinks that one thing will happen, and are watching out for it, whilst you do something completely different.
but as you can imagine, telling peiople the true outcome, will ruin all comedic value in the routine.
there now..
is that good enough for you? Its a leason in not telegraphing the ending, because in answering your question, ive given you something to reference

you're like Yoda.you dont say much, but what you do say is worth listening to....
Greg Wilson about.... Me.