Yes it does, in order to avoid "1234 Red 5678" becoming "12345678". Feel free to remove extra whitespace afterwards. Doing it in the regex would needlessly complicate it. 

s/.../ /xg;
s/^\s+//;
s/\s+$//;

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In reply to Re^3: RegEx to match at least one non-adjacent term by ikegami
in thread RegEx to match at least one non-adjacent term by Cefu

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