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Answers and rating deltas for

Can someone explain why a "+" is needed before closing quotes in an HTML tag?

Author Votes Δ
Ry- 4 +0.82
Buck Doyle 0 -0.39
James Curtis 0 -0.47
vol7ron 0 +0.12
Walls 0 -0.10
David 0 -0.78
Cam 0 +0.04
Last visited: Sep 14, 2014, 5:07:29 AM