patch 9.1.1178: not possible to generate completion candidates using fuzzy matching

Problem:  not possible to generate completion candidates using fuzzy
          matching
Solution: add the 'completefuzzycollect' option for (some) ins-completion
          modes (glepnir)

fixes #15296
fixes #15295
fixes #15294
closes: #16032

Signed-off-by: glepnir <glephunter@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/testdir/gen_opt_test.vim b/src/testdir/gen_opt_test.vim
index 9506532..b3a89a0 100644
--- a/src/testdir/gen_opt_test.vim
+++ b/src/testdir/gen_opt_test.vim
@@ -157,6 +157,9 @@
       \ 'completeopt': [['', 'menu', 'menuone', 'longest', 'preview', 'popup',
       \		'popuphidden', 'noinsert', 'noselect', 'fuzzy', "preinsert", 'menu,longest'],
       \		['xxx', 'menu,,,longest,']],
+      \ 'completefuzzycollect': [['', 'keyword', 'files', 'whole_line',
+      \		'keyword,whole_line', 'files,whole_line', 'keyword,files,whole_line'],
+      \		['xxx', 'keyword,,,whole_line,']],
       \ 'completeitemalign': [['abbr,kind,menu', 'menu,abbr,kind'],
       \		['', 'xxx', 'abbr', 'abbr,menu', 'abbr,menu,kind,abbr',
       \		'abbr1234,kind,menu']],