[Infer][Perf] do not emit 0 + when pretty-printing polynomials
[Infer][Perf] do not emit 0 + when pretty-printing polynomials

Reviewed By: mbouaziz

Differential Revision: D13042781

fbshipit-source-id: 60caf5005

facebook/infer,jvillard/infer,facebook/infer,facebook/infer,facebook/infer,facebook/infer,jvillard/infer,jvillard/infer,facebook/infer,jvillard/infer,facebook/infer,jvillard/infer,jvillard/infer,jvillard/infer