The mate of plus or minus - \(+- or +- - i.e. \(-+ or -+

[Damian McGuckin]

The groff_char(7) special character \(-+ which if read out loud would be 
"minus or plus" does not work. I only use that in an equation and in EQN,
I can get around it by defining

        define -+ % { + back 76 up 32 - } %

so it is not stopping me doing anything.

Should I put this into Savannah?

Thanks - Damian

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