correctly handle xmin and xmax for normalize_by_int() #8
Description
1.) Make sure that minWavelength is smaller than maxWavelength
2.) In sherpa-samp, make sure to handle xmin, xmax strings correctly.
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1.) Make sure that minWavelength is smaller than maxWavelength
2.) In sherpa-samp, make sure to handle xmin, xmax strings correctly.