Fix various typos (#1981)

CODE_OF_CONDUCT.md

@@ -5,7 +5,7 @@
 We as members, contributors, and leaders pledge to make participation in our
 community a harassment-free experience for everyone, regardless of age, body
 size, visible or invisible disability, ethnicity, sex characteristics, gender
-identity and expression, level of experience, education, socio-economic status,
+identity and expression, level of experience, education, socioeconomic status,
 nationality, personal appearance, race, religion, or sexual identity
 and orientation.
 

stable_baselines3/common/on_policy_algorithm.py

@@ -208,7 +208,7 @@ def collect_rollouts(
                 # Reshape in case of discrete action
                 actions = actions.reshape(-1, 1)
 
-            # Handle timeout by bootstraping with value function
+            # Handle timeout by bootstrapping with value function
             # see GitHub issue #633
             for idx, done in enumerate(dones):
                 if (

stable_baselines3/her/her_replay_buffer.py

@@ -396,7 +396,7 @@ def truncate_last_trajectory(self) -> None:
                 "If you are in the same episode as when the replay buffer was saved,\n"
                 "you should use `truncate_last_trajectory=False` to avoid that issue."
             )
-            # only consider epsiodes that are not finished
+            # only consider episodes that are not finished
             for env_idx in np.where(self._current_ep_start != self.pos)[0]:
                 # set done = True for last episodes
                 self.dones[self.pos - 1, env_idx] = True