patch 8.2.3421: a bit of code is not covered by tests
Problem: A bit of code is not covered by tests.
Solution: Add a few more test cases. (Dominique Pellé, closes #8857)
diff --git a/src/testdir/test_functions.vim b/src/testdir/test_functions.vim
index c0b4259..9a4b597 100644
--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -1621,6 +1621,7 @@
call assert_fails('eval trim(" vim ", " ", [])', 'E745:')
call assert_fails('eval trim(" vim ", " ", -1)', 'E475:')
call assert_fails('eval trim(" vim ", " ", 3)', 'E475:')
+ call assert_fails('eval trim(" vim ", 0)', 'E475:')
let chars = join(map(range(1, 0x20) + [0xa0], {n -> n->nr2char()}), '')
call assert_equal("x", trim(chars . "x" . chars))