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
Fix traceback in solaris package installation
Merge pull request #12276 from terminalmage/issue12237

Fix traceback in solaris package installation
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
Remove trailing white-space