Marking that the Date is optional (Reactive-Extensions#1229)

celikmus · Dec 6, 2016 · 4ea5c6a · 4ea5c6a
1 parent b17c2da
commit 4ea5c6a
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/doc/api/schedulers/historicalscheduler.md b/doc/api/schedulers/historicalscheduler.md
@@ -1,7 +1,7 @@
 ### `Rx.HistoricalScheduler` class
 [&#x24C8;](https://github.com/Reactive-Extensions/RxJS/blob/master/src/core/concurrency/historicalscheduler.js "View in source")
 
-Provides a virtual time scheduler that uses a `Date` for absolute time and time spans for relative time.  This inherits from the `Rx.VirtualTimeScheduler` class.
+Provides a virtual time scheduler that uses an optional `Date` for absolute time and time spans for relative time.  This inherits from the `Rx.VirtualTimeScheduler` class.
 
 ## Usage ##
 
@@ -108,4 +108,4 @@ var scheduler = new Rx.HistoricalScheduler(
   new Date(0),  /* initial clock of 0 */
   comparer      /* comparer for determining order */
 );
-```
+```