Docs for archive.tar should not use leading dash for tar options

[corywright]

Description of Issue/Question

The documentation for archive.tar uses a leading dash before the options that are to be passed through to the tar command. However, this leading dash is instead interpreted as the -c option that specifies a config_dir the salt command:

$ salt '*' archive.tar -cjvf /tmp/tarfile.tar.bz2 /tmp/file_1,/tmp/file_2
WARNING: CONFIG 'jvf' directory does not exist.
myminion:
    - tar: Old option 'b' requires an argument.
    - Try 'tar --help' or 'tar --usage' for more information.
ERROR: Minions returned with non-zero exit code

Removing the leading dash allows the options to tar to be properly passed through:

$ salt '*' archive.tar cjvf /tmp/tarfile.tar.bz2 /tmp/file_1,/tmp/file_2
myminion:
    - tar: Removing leading `/' from member names
    - /tmp/file_1
    - /tmp/file_2

This documentation bug is present in 2015.8, 2016.3, 2016.11, and 2017.7.

[gtmanfred]

Thanks for submitting the PR to fix these docs!
Daniel

[rallytime]

Closed via #44338