patch 8.2.0369: various Normal mode commands not fully tested

Problem:    Various Normal mode commands not fully tested.
Solution:   Add more tests. (Yegappan Lakshmanan, closes #5751)
diff --git a/src/testdir/test_arglist.vim b/src/testdir/test_arglist.vim
index a3921c1..d73a3cc 100644
--- a/src/testdir/test_arglist.vim
+++ b/src/testdir/test_arglist.vim
@@ -539,6 +539,11 @@
   call term_wait(buf)
   call WaitForAssert({-> assert_equal("finished", term_getstatus(buf))})
   only!
+  " When this test fails, swap files are left behind which breaks subsequent
+  " tests
+  call delete('.a.swp')
+  call delete('.b.swp')
+  call delete('.c.swp')
 endfunc
 
 " vim: shiftwidth=2 sts=2 expandtab