pythagorean-triplet: Describe problem with variable sum N
pythagorean-triplet: Describe problem with variable sum N

This form of the problem was ratified in the canonical data
https://github.com/exercism/problem-specifications/pull/1332

https://github.com/exercism/problem-specifications/issues/1211
https://github.com/exercism/problem-specifications/pull/1395

exercism/xhaskell