Determining string gauge
Instruments- discuss specific features, luthiers, instrument problems & questions
Nina, you can trim the strings without cutting them by bending them back and forth and back and forth and back and forth until they break on their own, which will almost always be right at the point where they emerge from the hole in the post. That way nothing will be sticking out. I usually don't bother with that and just snip them with wire cutters, but then I use the side of the wire cutters to bend the sharp end in so that they don't stick out straight.
Another option, though it looks kind of funky, is not to trim the ends at all, but when you are dong to run them along the side of a pair of scissors. The string will curl up into a bouncy coil. That is the same technique you've probably used with ribbon when wrapping presents.
In the future, I hope we all have those self-trimming tuners that Brian G mentions above.

Thank you so very much for sharing this.