Suggestion: Option to avoid the `strip` of output lines

[radujipa]

Hey @pazdera :)

Any chance we could have an option to the Scripster::cmd function to avoid stripping output lines of trailing and leading spaces similar to the show_out? I'm referring to the one here and here (possibly others?).

Justification for this is basically to avoid undoing a script's formatted output, e.g. printing a JSON.