Fix small things (#3420)

composer/core/state.py

@@ -759,7 +759,7 @@ def _iteration_length(self):
     def _iteration_length(self, iteration_length: Optional[Union[str, Time[int]]]):
         """Sets the length of an iteration.
 
-        An iteration must be defined as multiple epochs. See composer/core/event.py.
+        An iteration must be defined as multiple epochs or tokens. See composer/core/event.py.
         """
         if iteration_length is None:
             self.__iteration_length = None
@@ -777,7 +777,7 @@ def stop_training(self):
         logging, and evaluation for that batch, as well as any epoch end events.
         """
         # Set the max_duration to the current time in its unit, except if the unit is TimeUnit.EPOCH. This is because TimeUnit.EPOCH is a very crude way to measure max duration. For example, it will result in division by zero error while computing get_elapsed_duration: https://github.com/mosaicml/composer/blob/1b9c6d3c0592183b947fd89890de0832366e33a7/composer/core/state.py#L641
-        if self.max_duration is not None and Time.from_input(self.max_duration,).unit != TimeUnit.EPOCH:
+        if self.max_duration is not None and Time.from_input(self.max_duration).unit != TimeUnit.EPOCH:
             max_duration_unit = Time.from_input(self.max_duration).unit
             self.max_duration = self.timestamp.get(max_duration_unit)
         else: