vim-patch:8.0.1738: ":args" output is hard to read

Problem:    ":args" output is hard to read.
Solution:   Make columns with the names if the output is more than one line.
5d69da462f

vim-patch:8.0.1740: warning for signed-unsigned incompatibility

Problem:    Warning for signed-unsigned incompatibility.
Solution:   Change type from "char *" to "char_u *". (John Marriott)
405dadb63e

Removes ported legacy test that was re-added later.
Ref: https://github.com/neovim/neovim/pull/10147#issuecomment-512609513

test/functional/legacy/arglist_spec.lua

@@ -92,74 +92,6 @@ describe('argument list commands', function()
     eq(0, eval('len(argv())'))
   end)
 
-  it('test for [count]argument and [count]argdelete commands', function()
-    reset_arglist()
-    command('let save_hidden = &hidden')
-    command('set hidden')
-    command('let g:buffers = []')
-    command('augroup TEST')
-    command([[au BufEnter * call add(buffers, expand('%:t'))]])
-    command('augroup END')
-
-    command('argadd a b c d')
-    command('$argu')
-    command('$-argu')
-    command('-argu')
-    command('1argu')
-    command('+2argu')
-
-    command('augroup TEST')
-    command('au!')
-    command('augroup END')
-
-    eq({'d', 'c', 'b', 'a', 'c'}, eval('g:buffers'))
-
-    command('redir => result')
-    command('ar')
-    command('redir END')
-    eq(1, eval([[result =~# 'a b \[c] d']]))
-
-    command('.argd')
-    eq({'a', 'b', 'd'}, eval('argv()'))
-
-    command('-argd')
-    eq({'a', 'd'}, eval('argv()'))
-
-    command('$argd')
-    eq({'a'}, eval('argv()'))
-
-    command('1arga c')
-    command('1arga b')
-    command('$argu')
-    command('$arga x')
-    eq({'a', 'b', 'c', 'x'}, eval('argv()'))
-
-    command('0arga Y')
-    eq({'Y', 'a', 'b', 'c', 'x'}, eval('argv()'))
-
-    command('%argd')
-    eq({}, eval('argv()'))
-
-    command('arga a b c d e f')
-    command('2,$-argd')
-    eq({'a', 'f'}, eval('argv()'))
-
-    command('let &hidden = save_hidden')
-
-    -- Setting the argument list should fail when the current buffer has
-    -- unsaved changes
-    command('%argd')
-    command('enew!')
-    command('set modified')
-    assert_fails('args x y z', 'E37:')
-    command('args! x y z')
-    eq({'x', 'y', 'z'}, eval('argv()'))
-    eq('x', eval('expand("%:t")'))
-
-    command('%argdelete')
-    assert_fails('argument', 'E163:')
-  end)
-
   it('test for 0argadd and 0argedit', function()
     reset_arglist()