Function All-Matches

Part of:

package cl-ppcre
( all-matches < regex > < target-string > &key < start > < end > )

Returns a list containing the start and end positions of all
matches of REGEX against TARGET-STRING, i.e. if there are N matches
the list contains (* 2 N) elements. If REGEX matches an empty string
the scan is continued one position behind this match.