Merge pull request open-mmlab#34 from kashif/patch-1

fixed typo in comment

Author: anton-l

src/diffusers/schedulers/scheduling_ddpm.py

@@ -92,9 +92,9 @@ def get_variance(self, t, variance_type=None):
         alpha_prod_t = self.alphas_cumprod[t]
         alpha_prod_t_prev = self.alphas_cumprod[t - 1] if t > 0 else self.one
 
-        # For t > 0, compute predicted variance βt (see formala (6) and (7) from https://arxiv.org/pdf/2006.11239.pdf)
+        # For t > 0, compute predicted variance βt (see formula (6) and (7) from https://arxiv.org/pdf/2006.11239.pdf)
         # and sample from it to get previous sample
-        # x_{t-1} ~ N(pred_prev_sample, variance) == add variane to pred_sample
+        # x_{t-1} ~ N(pred_prev_sample, variance) == add variance to pred_sample
         variance = (1 - alpha_prod_t_prev) / (1 - alpha_prod_t) * self.betas[t]
 
         if variance_type is None: