contrib/bash_completion.d: squelch FreeBSD seq when first < last

[derekschrock]

With seq x -1 z and x is less than z FreeBSD seq will print the error:

$ seq 1 -1 2
seq: needs positive increment

Hide this error. Alternatively $COMP_CWORD could be checked for < 2.

Signed-off-by: Derek Schrock dereks@lifeofadishwasher.com

Motivation and Context

Hides an error message on FreeBSD seq if the number of words in the completion list is less than 2

Description

Send stderr to /dev/null

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Performance enhancement (non-breaking change which improves efficiency)
• Code cleanup (non-breaking change which makes code smaller or more readable)
• Breaking change (fix or feature that would cause existing functionality to change)
• Library ABI change (libzfs, libzfs_core, libnvpair, libuutil and libzfsbootenv)
• Documentation (a change to man pages or other documentation)

Checklist:

• My code follows the OpenZFS code style requirements.
• I have updated the documentation accordingly.
• I have read the contributing document.
• I have added tests to cover my changes.
• I have run the ZFS Test Suite with this change applied.
• All commit messages are properly formatted and contain Signed-off-by.