doc: make writable.setDefaultEncoding() return this

Let this function return `this` for parity with `readable.setEncoding()`. PR-URL: nodejs#5040 Fixes: nodejs#5013 Reviewed-By: Matteo Collina <[email protected]> Reviewed-By: Calvin Metcalf <[email protected]> Reviewed-By: James M Snell <[email protected]>
joelostrowski · May 4, 2016 · f420583 · f420583
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diff --git a/doc/api/stream.md b/doc/api/stream.md
@@ -695,6 +695,7 @@ file.end('world!');
 #### writable.setDefaultEncoding(encoding)
 
 * `encoding` {String} The new default encoding
+* Return: `this`
 
 Sets the default encoding for a writable stream.
 

diff --git a/lib/_stream_writable.js b/lib/_stream_writable.js
@@ -251,6 +251,7 @@ Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
   if (!Buffer.isEncoding(encoding))
     throw new TypeError('Unknown encoding: ' + encoding);
   this._writableState.defaultEncoding = encoding;
+  return this;
 };
 
 function decodeChunk(state, chunk, encoding) {