patch 8.2.0540: regexp and other code not tested

Problem:    Regexp and other code not tested.
Solution:   Add more tests. (Yegappan Lakshmanan, closes #5904)
diff --git a/src/testdir/test_virtualedit.vim b/src/testdir/test_virtualedit.vim
index bfb4985..6f82f30 100644
--- a/src/testdir/test_virtualedit.vim
+++ b/src/testdir/test_virtualedit.vim
@@ -346,4 +346,15 @@
   set virtualedit=
 endfunc
 
+" Test for delete that breaks a tab into spaces
+func Test_delete_break_tab()
+  new
+  call setline(1, "one\ttwo")
+  set virtualedit=all
+  normal v3ld
+  call assert_equal('    two', getline(1))
+  set virtualedit&
+  close!
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab