Code review.

docs/metrics/customizing-the-sdk/README.md

@@ -372,7 +372,7 @@ AnotherFruitCounter.Add(1, new("name", "apple"), new("color", "red"));
 A Metric contains many Metric points which are the number of unique combinations
 of key/values recorded by an instrument. To protect the SDK from unbounded
 memory usage, there is a default limit of 2000 metric points per metric which
-will be maintained at any given time. Once the limit is hit, any new key/value
+will be maintained by the SDK. Once the limit is hit, any new key/value
 combination for a metric will be ignored. The SDK chooses the key/value
 combinations in the order in which they are emitted.