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
Merge pull request #12263 from s0undt3ch/issues/12261-too-many-args-to-docs

Fail soon on too many args to docs