Allow getting `stderr` from the commands.
Check for extra arguments to '--doc' and fail. Fixes #12261.
Handle too many arguments for docs in salt-call. Refs #12261.
Handle too many arguments for docs in salt-run. Refs #12261.
Better examples on tests
Remove unused import

30d9675 removed the only reference to SaltInvocationError, but left the
import. This removes it.
add a test function to make a random string
Set the lxc bootstrap data in respective subdirs
Merge pull request #12282 from terminalmage/lint

Remove unused import
Fix doc typos about s3.verify_ssl flag
Merge pull request #12263 from s0undt3ch/issues/12261-too-many-args-to-docs

Fail soon on too many args to docs
Merge pull request #12287 from jslatts/s3_doc_typo

Fix doc typos about s3.verify_ssl flag
Add missing required space
Bash is not always available.

Let's stick with POSIX compliant shell
Don't rely on `EUID`
Remove trailing white-space
Merge pull request #12288 from s0undt3ch/hotfix/lxc-fixes

LXC tarball fixes
Now it is working! Only tested without the bootstrap script though
Fixed error in docs, `creates` is only available in Helium
Merge pull request #12293 from basepi/cmdcreates12285

Fixed error in docs, `creates` is only available in Helium