patch 8.1.1996: more functions can be used as methods
Problem: More functions can be used as methods.
Solution: Make various functions usable as a method.
diff --git a/src/testdir/test_vartabs.vim b/src/testdir/test_vartabs.vim
index b0f3e15..47844fb 100644
--- a/src/testdir/test_vartabs.vim
+++ b/src/testdir/test_vartabs.vim
@@ -329,7 +329,7 @@
let lines = ScreenLines([1, 2], winwidth(0))
call s:compare_lines(expect2, lines)
call assert_equal(20, shiftwidth(virtcol('.')-2))
- call assert_equal(30, shiftwidth(virtcol('.')))
+ call assert_equal(30, virtcol('.')->shiftwidth())
norm! $>>
let expect3 = [' ', ' x ', '~ ']
let lines = ScreenLines([1, 3], winwidth(0))