bootstrap:constraints: examples: snprint_constraint() output is unstable
bootstrap:constraints: examples: snprint_constraint() output is unstable

As the underlying data structure is unordered, constraints don't get
printed the same way every time. Short term, we only check the length
of the generated string. Long term, we will be changing extensively the
constraint data structure.

nanocritical/n,nanocritical/n,nanocritical/n,nanocritical/n