#5943 remove nbsp before saving as png (#6170)
#5943 remove nbsp before saving as png (#6170)


twosigma/beakerx,jpallas/beakerx,twosigma/beakerx,twosigma/beaker-notebook,jpallas/beakerx,jpallas/beakerx,twosigma/beakerx,twosigma/beakerx,jpallas/beakerx,twosigma/beaker-notebook,jpallas/beakerx,jpallas/beakerx,twosigma/beaker-notebook,twosigma/beakerx,twosigma/beaker-notebook,twosigma/beakerx,twosigma/beaker-notebook