But this isn't 0 .. 14 inclusive:

[ 6:16:11.35] C:\test>ranges -M=14 -N=11
 0 : from       0 to       0 (      1)
 1 : from       1 to       1 (      1)
 2 : from       2 to       3 (      2)
 3 : from       4 to       4 (      1)
 4 : from       5 to       5 (      1)
 5 : from       6 to       7 (      2)
 6 : from       8 to       8 (      1)
 7 : from       9 to       9 (      1)
 8 : from      10 to      11 (      2)
 9 : from      12 to      12 (      1)
10 : from      13 to      13 (      1)
========================================
                                   14
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Based on your previous results, I expect non-inclusive every time. If my expectation is wrong, then why is the result above non-inclusive (i.e. does not end with index 14)?

(I'm not adamant on my expectation of non-inclusiveness. I just expect consistent behavior. :-)