doc: switch the order of Writable and Readable

This change places the links to Writable stream and Readble stream in the order these sections appear when scrolling down the screen. PR-URL: #21333 Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
nodejs · ghost · Jun 12, 2018 · Jun 12, 2018 · Jun 13, 2018 · Jun 8, 2018
commit dcad7c93fbdd6887e76e30ac99bb4d9a159659c8
diff --git a/doc/api/stream.md b/doc/api/stream.md
@@ -37,10 +37,10 @@ the elements of the API that are required to *implement* new types of streams.
 
 There are four fundamental stream types within Node.js:
 
-* [`Readable`][] - streams from which data can be read (for example
-  [`fs.createReadStream()`][]).
 * [`Writable`][] - streams to which data can be written (for example
   [`fs.createWriteStream()`][]).
+* [`Readable`][] - streams from which data can be read (for example
+  [`fs.createReadStream()`][]).
 * [`Duplex`][] - streams that are both `Readable` and `Writable` (for example
   [`net.Socket`][]).
 * [`Transform`][] - `Duplex` streams that can modify or transform the data as it