enh(bash) added gnu core utilities

[katzeprior]

I added the gnu core utils commands to bash for future changes.

Almost Resolves #3342

Changes

1. Added gnu core utilities commands to the bash list.
2. fixed bash tests to reflect changes.
3. fixed 1/3 test errors in shell and docker tests.

Checklist

• Added markup tests, or they don't apply here because...
  fixed most not added
• Updated the changelog at CHANGES.md

[joshgoebel]

For a quick fix (I'm not sure how much work you want to put in here) you could just remove install from the list and then fixup the remaining tests for the least amount of effort.

[joshgoebel]

I think that's about as close as we're going to get for now unless you want to look into adding individual rules for all the edge cases:

• &&, |, etc...

That would be much easier to do in the future though once we support look-behind.

Thoughts?

[katzeprior]

Sounds good for now. Don't know how the look-behind feature will look but i will check it out when i have more time.
Would be best if we get the start of the line and the && | working because ssh doesn't fit in the list but still should be highlighted i think.

[joshgoebel]

Don't know how the look-behind feature will look

I'm speaking of look-behind in regex. Useful to say "something that was immediately proceeded by"... but it's not supported in all browsers yet, so we wait... without it you have to do a more complex multi-matcher to handle those cases.

ssh doesn't fit in the list but still should be highlighted i think.
I don't necessarily disagree but I'm not sure we should highlight "every single useful linux command" under the sun... so I feel like we may need further justification before just adding the top 50 random linux tools. :-) Feels like we need some kind of criteria.