vim-patch:9.2.0374: c_CTRL-{G,T} does not handle offset
Problem: c_CTRL-{G,T} does not handle offset, when cycling between
matches
Solution: Refactor parsing logic into parse_search_pattern_offset() and
handle offsets, note: highlighting does not handle offsets
yet (Barrett Ruth).
fixes: vim/vim#19991closes: vim/vim#19998c62342e5cf