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 == en dashes vs minus signs vs hyphens == 

 Hi Jack, a user has queried this edit. It does look as though you replaced his minus signs with hyphens, as they had been before his edit. Minus signs are longer than hyphens and a little shorter (and horizontally placed lower, I think) than en dashes. Mathematicians are very fussy about them, and the MoS insists on them in that context. I checked with GregU, the dash-script inventor, and he assured me it does insert minus signs, not en dashes, in such contexts.   "