patch 8.1.1921: 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_expand.vim b/src/testdir/test_expand.vim
index bd8021f..53f753d 100644
--- a/src/testdir/test_expand.vim
+++ b/src/testdir/test_expand.vim
@@ -58,7 +58,7 @@
call assert_equal('e Xfile1', expandcmd('e %'))
edit Xfile2
edit Xfile1
- call assert_equal('e Xfile2', expandcmd('e #'))
+ call assert_equal('e Xfile2', 'e #'->expandcmd())
edit Xfile2
edit Xfile3
edit Xfile4