switching k=4 to k=1 allows to generate images of WAY better quality

[romain-rsr]

Hi,

As the title says, replacing k=4 by k=1 and keeping the rest of the code untouched allows the quality of the generated handwritten digits to be two or three times better.

By the way it seems that k=1 is the value used in the original paper experiments :

The number of steps to apply to the discriminator, k, is a hyperparameter. We used k = 1, the least expensive option, in our experiments.