[LTP] [PATCH v2] unlink07: use TST_EXP_FAIL(), docparse format, copyright update and remove redundant headers

[Petr Vorel]

Hi Avinesh,

I merged with following diff:

* kept relevant headers (It might be a good practise to keep *relevant headers -
library can be rewritten and headers removed, the build would fail).
* fixed docparse formatting (blank line before list is needed

Thanks!

...
> +++ b/testcases/kernel/syscalls/unlink/unlink07.c
> @@ -1,23 +1,22 @@
>  // SPDX-License-Identifier: GPL-2.0-or-later
>  /*
>   * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
> + * Copyright (c) Linux Test Project, 2002-2022
>   */

> -/*
> - * Description:
> - * The testcase checks the various errnos of the unlink(2).
> - * 1) unlink() returns ENOENT if file doesn't exist.
> - * 2) unlink() returns ENOENT if path is empty.
> - * 3) unlink() returns ENOENT if path contains a non-existent file.
> - * 4) unlink() returns EFAULT if address is invalid.
> - * 5) unlink() returns ENOTDIR if path contains a regular file.
> - * 6) unlink() returns ENAMETOOLONG if path contains a regular file.
> +/*\
> + * [Description]
> + *
> + * Verify that unlink() fails with
blank line is needed here.
> + * - ENOENT when file does not exist
> + * - ENOENT when pathname is empty
> + * - ENOENT when a component in pathname does not exist
> + * - EFAULT when pathname points outside the accessible address space
> + * - ENOTDIR when a component used as a directory in pathname is not,
> + * in fact, a directory
> + * - ENAMETOOLONG when pathname is too long
>   */

Kind regards,
Petr