Split a string based on a range delimiter pattern.
A range delimited string has the pattern VALUE - VALUE, where whitespace
at the start, around the - delimiter, and at the end is not significant.
The delimited can be any one of -, ~, or ～ (0xFF5E).
Parameters
range: undefined | string
the range string to split into components, whitespace trimmed
Returns string[] | undefined
the split range, of length 1 or 2, or undefined if range is undefined
Split a string based on a range delimiter pattern.
A range delimited string has the pattern
VALUE - VALUE, where whitespace at the start, around the-delimiter, and at the end is not significant. The delimited can be any one of-,~, or～(0xFF5E).