doc: fix typo in streams.md

jpbamberg1993 · addaleax · commit a6e416270d11 · 2017-04-15T20:32:09.000+02:00
PR-URL: nodejs#12428 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
diff --git a/doc/api/stream.md b/doc/api/stream.md
@@ -1122,7 +1122,7 @@ implement streams using JavaScript's prototypal inheritance model.
 
 First, a stream developer would declare a new JavaScript class that extends one
 of the four basic stream classes (`stream.Writable`, `stream.Readable`,
-`stream.Duplex`, or `stream.Transform`), making sure the call the appropriate
+`stream.Duplex`, or `stream.Transform`), making sure they call the appropriate
 parent class constructor:
 
 ```js
