patch 8.2.1766: Vim9: Some tests are still using :let
Problem: Vim9: Some tests are still using :let.
Solution: Change the last few declarations to use :var.
diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index 1a83227..3ff8c67 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -355,6 +355,9 @@
qall!
endfunc
+" TODO: remove later
+let v:disallow_let = 1
+
" Source the test script. First grab the file name, in case the script
" navigates away. g:testname can be used by the tests.
let g:testname = expand('%')