Trim that bug! (src/core/s-trim.c)

2013.02.02 by CCX

	>> trim "  x ^/"
	== "x x^/"

Fixed that trim bug, found in `trim_head_tail()`. Changed some var
names to make the algorithm easier to understand. `head` and `tail`
are now trimmed first because its simpler this way.

First time I ever use github...