Using Text::ParseWords will introduce some incompatibilities.

• shellwords parses the text in a manner "similar to most Unix shells". Backticks use the bourne shell, not "most unix shells".

• Redirection and other shell instructions are silently treated as arguments instead of resulting in an error.

• Environment and special variables won't be interpolated.

• Globs won't be expanded.

Update: Added last item.

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