CLI: For columnar modes ("box", "column", "table", "markdown") the ".width"

CLI: For columnar modes ("box", "column", "table", "markdown") the ".width"
is now both the minimum and maximum width of the column.  Text that spans
multiple lines or that contains tabs is properly formatted.  If any part of
the output contains multi-line text, then extra separators are provided between
each row.

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