### SUMMARY
```
  sha256sum:
    description:
      - If a SHA-256 checksum is passed to this parameter, the digest of the
        destination file will be calculated after it is downloaded to ensure
        its integrity and verify that the transfer completed successfully.
        This option is deprecated. Use C(checksum) instead.
```

There is no `module.deprecate` either for `sha256sum`.

the argument has been declared deprecated in commit b3b11fbce26 (2017)

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
get_url

* ansible version: 2.10

- If C(yes) and C(dest) is not a directory, will download the file every
        time and replace the file if the contents change. If C(no), the file
        will only be downloaded if the destination does not exist. Generally
        should be C(yes) only for small local files.
      - Prior to 0.6, this module behaved as if C(yes) was the default.
      - Alias C(thirsty) has been deprecated and will be removed in 2.13.
    type: bool
    default: no
    aliases: [ thirsty ]
    version_added: '0.7'
  backup:
    description:
      - Create a backup file including the timestamp information so you can get
        the original file back if you somehow clobbered it incorrectly.
    type: bool
    default: no
    version_added: '2.1'
  sha256sum:
    description:
      - If a SHA-256 checksum is passed to this parameter, the digest of the
        destination file will be calculated after it is downloaded to ensure
        its integrity and verify that the transfer completed successfully.
        This option is deprecated. Use C(checksum) instead.
    default: ''
    version_added: "1.3"
  checksum:
    description:
      - 'If a checksum is passed to this parameter, the digest of the
        destination file will be calculated after it is downloaded to ensure
        its integrity and verify that the transfer completed successfully.