gnus-remove-from-range

gnus-remove-from-range is an autoloaded compiled Lisp function in `gnus-range.el'.

(gnus-remove-from-range RANGE1 RANGE2)

Return a range that has all articles from RANGE2 removed from RANGE1.
The returned range is always a list. RANGE2 can also be a unsorted
list of articles. RANGE1 is modified by side effects, RANGE2 is not
modified.