fix cglpk MIP solution formatting
fix cglpk MIP solution formatting

aebrahim/cobrapy,aebrahim/cobrapy,JuBra/cobrapy,zakandrewking/cobrapy,zakandrewking/cobrapy,jerkos/cobrapy,jeicher/cobrapy,jerkos/cobrapy,JuBra/cobrapy,jeicher/cobrapy