patch 8.2.0363: some Normal mode commands not tested

Problem:    Some Normal mode commands not tested.
Solution:   Add more tests. (Yegappan Lakshmanan, closes #5746)
diff --git a/src/testdir/test_virtualedit.vim b/src/testdir/test_virtualedit.vim
index 25ca33f..bfb4985 100644
--- a/src/testdir/test_virtualedit.vim
+++ b/src/testdir/test_virtualedit.vim
@@ -301,6 +301,9 @@
   call append(0, "'r'\t")
   normal gg^5lrxAy
   call assert_equal("'r'  x  y", getline(1))
+  call setline(1, 'aaaaaaaaaaaa')
+  exe "normal! gg2lgR\<Tab>"
+  call assert_equal("aa\taaaa", getline(1))
   bwipe!
   set virtualedit=
 endfunc