SPLIT BY multiple chars
Created by: Lartu
SPLIT BY X FROM - IN <vector> and SPLIT BY X FROM - IN <list> do not work if the length of X is greater than 1 (does work with 0, as specified in the documentation though). An error should be raised if the length of X is greater than one (bear in mind that X might be an utf8 literal) or we should allow splitting by multiple characters, but at the moment if you try to split a text by something lengthier it will just return a list or vector containing the original string.