Fix docs

opentelemetry-sdk/src/opentelemetry/sdk/_metrics/metric_reader.py

@@ -41,15 +41,15 @@ class MetricReader(ABC):
 
     Args:
         preferred_temporality: A mapping between instrument classes and
-        aggregation temporality. By default uses CUMULATIVE for all instrument
-        classes. This mapping will be used to define the default aggregation
-        temporality of every instrument class. If the user wants to make a
-        change in the default aggregation temporality of an instrument class,
-        it is enough to pass here a dictionary whose keys are the instrument
-        classes and the values are the corresponding desired aggregation
-        temporalities of the classes that the user wants to change, not all of
-        them. The classes not included in the passed dictionary will retain
-        their association to their default aggregation temporalities.
+            aggregation temporality. By default uses CUMULATIVE for all instrument
+            classes. This mapping will be used to define the default aggregation
+            temporality of every instrument class. If the user wants to make a
+            change in the default aggregation temporality of an instrument class,
+            it is enough to pass here a dictionary whose keys are the instrument
+            classes and the values are the corresponding desired aggregation
+            temporalities of the classes that the user wants to change, not all of
+            them. The classes not included in the passed dictionary will retain
+            their association to their default aggregation temporalities.
 
     .. document protected _receive_metrics which is a intended to be overriden by subclass
     .. automethod:: _receive_metrics