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Perl regex - why does the regex /[0-9\.]+(\,)/ match comma

Author Votes Δ
Schwern 4 +1.56
maerics 3 +0.85
Andrew Cheong 2 -0.35
ikegami 2 -1.05
Patrick 1 -3.32
Last visited: Sep 14, 2014, 5:07:29 AM