Minor cleanups

usagepool.go

@@ -25,14 +25,15 @@ import (
 // only inserted if they do not already exist. There
 // are two ways to add values to the pool:
 //
-// 1) LoadOrStore will increment usage and store the
-//    value immediately if it does not already exist
-// 2) LoadOrNew will increment usage and construct the
-//    value immediately if it does not already exist,
-//    then store that value in the pool. When the
-//    constructed value is finally deleted from the
-//    pool (after its usage reaches 0), it will be
-//    cleaned up by calling its Destruct method.
+//     1) LoadOrStore will increment usage and store the
+//        value immediately if it does not already exist.
+//     2) LoadOrNew will atomically check for existence
+//        and construct the value immediately if it does
+//        not already exist, or increment the usage
+//        otherwise, then store that value in the pool.
+//        When the constructed value is finally deleted
+//        from the pool (when its usage reaches 0), it
+//        will be cleaned up by calling Destruct().
 //
 // The use of LoadOrNew allows values to be created
 // and reused and finally cleaned up only once, even