Inconsistent Sample Format (urs / t-wise)

[h3ssto]

The output (both to stdout and file) between uniform sampling and t-wise sampling is inconsistent.

• urs: no index, config white-space separated
• t-wise: indexed with comma, config white-space seperated

> ./ddnnife -i sandwich.dimacs urs -n 5
-1 2 -3 4 5 -6 -7 8 9 10 11 12 -13 14 15 16 17 -18 19
1 2 3 4 5 6 -7 8 9 10 11 -12 -13 -14 -15 16 17 -18 -19
1 2 -3 4 5 -6 -7 8 -9 10 -11 -12 -13 -14 -15 -16 -17 -18 19
-1 2 3 4 -5 -6 7 8 9 10 -11 -12 -13 -14 -15 16 17 -18 19
-1 2 -3 4 5 6 -7 8 9 10 -11 12 -13 14 15 16 -17 -18 19

> ./ddnnife -i sandwich.dimacs t-wise
0,1 2 -3 -4 5 -6 -7 8 -9 10 11 -12 -13 -14 -15 16 -17 -18 -19
1,-1 2 -3 4 5 -6 -7 8 -9 10 11 12 -13 -14 15 16 -17 18 19
2,-1 -2 3 4 -5 -6 7 8 -9 10 -11 -12 -13 14 15 -16 -17 -18 -19
3,1 2 3 4 5 6 -7 8 9 10 -11 -12 13 14 15 16 17 -18 19
4,-1 2 3 4 5 6 7 8 9 10 11 -12 13 14 15 -16 17 -18 19
5,-1 2 -3 4 -5 6 -7 8 9 10 11 12 -13 14 15 -16 17 -18 19
6,-1 -2 -3 -4 -5 6 7 8 9 10 -11 -12 13 -14 -15 -16 17 -18 -19
7,-1 2 -3 -4 -5 -6 -7 8 -9 10 -11 12 -13 -14 -15 16 -17 -18 -19
8,-1 2 3 4 5 -6 7 8 9 10 11 -12 13 -14 15 16 17 18 19
9,1 -2 3 4 -5 6 -7 8 9 10 -11 -12 13 -14 15 -16 17 18 -19
10,-1 -2 3 4 -5 6 -7 8 9 10 -11 12 13 -14 -15 -16 -17 -18 19