remove tau from diff for

Project/Assets/ML-Agents/Examples/Hallway/Scripts/HallwayCollabAgent.cs

                 else
                 {
                     SetReward(-0.1f);
-                    teammate.SetReward(-0.1f);
+                    teammate.SetReward(-1f);
                     StartCoroutine(GoalScoredSwapGroundMaterial(m_HallwaySettings.failMaterial, 0.5f));
                 }
                 EndEpisode();

Project/Assets/ML-Agents/Examples/Soccer/Scenes/SoccerTwos.unity

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config/ppo/SoccerTwos.yaml

           min_lesson_length: 100
           threshold: 0.003
         value: 0.0
-#env_settings:
-#  num_envs: 2
+env_settings:
+  num_envs: 1

ml-agents/mlagents/trainers/ppo/optimizer_torch.py

             memories=memories,
             seq_len=self.policy.sequence_length,
         )
-        obs[-1] = comms[0]
+        obs[-1] = comms[1]
 
         log_probs, entropy, values = self.policy.evaluate_actions(
             obs,

ml-agents/mlagents/trainers/torch/distributions.py

     ) -> torch.Tensor:
         # Zero out masked logits, then subtract a large value. Technique mentionend here:
         # https://arxiv.org/abs/2006.14171. Our implementation is ONNX and Barracuda-friendly.
-        #if allow_mask.shape[1] == 3:
+        # if allow_mask.shape[1] == 3:
         #    allow_mask = allow_mask[:, :1].expand(-1, 3)
         block_mask = -1.0 * allow_mask + 1.0
         # We do -1 * tensor + constant instead of constant - tensor because it seems
             logits = branch(inputs)
             norm_logits = self._mask_branch(logits, masks[idx])
             distribution = torch.nn.functional.gumbel_softmax(
-                norm_logits, tau=0.1, hard=True, dim=1
+                norm_logits, hard=True, dim=1
             )
             branch_distributions.append(distribution)
         return branch_distributions

ml-agents/mlagents/trainers/trajectory.py

         for step, exp in enumerate(self.steps):
             if step == 0:
                 # this initial all zeros creates the offset for comms
-                
-                dummy = [[np.zeros_like(col_ob) for col_ob in exp.collab_obs[_ag]] for _ag in range(len(exp.collab_obs))]
+
+                dummy = [
+                    [np.zeros_like(col_ob) for col_ob in exp.collab_obs[_ag]]
+                    for _ag in range(len(exp.collab_obs))
+                ]
                 agent_buffer_trajectory["comm_obs"].append(dummy)
             if step < len(self.steps) - 1:
                 next_obs = self.steps[step + 1].obs