doc: add `added:` information for stream

Ref: https://github.com/nodejs/node/issues/6578
PR-URL: https://github.com/nodejs/node/pull/7287
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Claudio Rodriguez <cjrodr@yahoo.com>

doc/api/stream.md

@@ -116,7 +116,7 @@ const server = http.createServer( (req, res) => {
   // req is an http.IncomingMessage, which is a Readable Stream
   // res is an http.ServerResponse, which is a Writable Stream
 
-  var body = '';
+  let body = '';
   // Get the data as utf8 strings.
   // If an encoding is not set, Buffer objects will be received.
   req.setEncoding('utf8');
@@ -205,10 +205,16 @@ myStream.end('done writing data');
 ```
 
 #### Class: stream.Writable
+<!-- YAML
+added: v0.9.4
+-->
 
 <!--type=class-->
 
 ##### Event: 'close'
+<!-- YAML
+added: v0.9.4
+-->
 
 The `'close'` event is emitted when the stream and any of its underlying
 resources (a file descriptor, for example) have been closed. The event indicates
@@ -217,6 +223,9 @@ that no more events will be emitted, and no further computation will occur.
 Not all Writable streams will emit the `'close'` event.
 
 ##### Event: 'drain'
+<!-- YAML
+added: v0.9.4
+-->
 
 If a call to [`stream.write(chunk)`][stream-write] returns `false`, the
 `'drain'` event will be emitted when it is appropriate to resume writing data
@@ -226,7 +235,7 @@ to the stream.
 // Write the data to the supplied writable stream one million times.
 // Be attentive to back-pressure.
 function writeOneMillionTimes(writer, data, encoding, callback) {
-  var i = 1000000;
+  let i = 1000000;
   write();
   function write() {
     var ok = true;
@@ -251,6 +260,9 @@ function writeOneMillionTimes(writer, data, encoding, callback) {
 ```
 
 ##### Event: 'error'
+<!-- YAML
+added: v0.9.4
+-->
 
 * {Error}
 
@@ -260,6 +272,9 @@ data. The listener callback is passed a single `Error` argument when called.
 *Note*: The stream is not closed when the `'error'` event is emitted.
 
 ##### Event: 'finish'
+<!-- YAML
+added: v0.9.4
+-->
 
 The `'finish'` event is emitted after the [`stream.end()`][stream-end] method
 has been called, and all data has been flushed to the underlying system.
@@ -276,6 +291,9 @@ writer.on('finish', () => {
 ```
 
 ##### Event: 'pipe'
+<!-- YAML
+added: v0.9.4
+-->
 
 * `src` {stream.Readable} source stream that is piping to this writable
 
@@ -293,6 +311,9 @@ reader.pipe(writer);
 ```
 
 ##### Event: 'unpipe'
+<!-- YAML
+added: v0.9.4
+-->
 
 * `src` {[Readable][] Stream} The source stream that
   [unpiped][`stream.unpipe()`] this writable
@@ -313,6 +334,9 @@ reader.unpipe(writer);
 ```
 
 ##### writable.cork()
+<!-- YAML
+added: v0.11.2
+-->
 
 The `writable.cork()` method forces all written data to be buffered in memory.
 The buffered data will be flushed when either the [`stream.uncork()`][] or
@@ -325,6 +349,9 @@ implementations that implement the `writable._writev()` method can perform
 buffered writes in a more optimized manner.
 
 ##### writable.end([chunk][, encoding][, callback])
+<!-- YAML
+added: v0.9.4
+-->
 
 * `chunk` {String|Buffer|any} Optional data to write. For streams not operating
   in object mode, `chunk` must be a string or a `Buffer`. For object mode
@@ -350,6 +377,9 @@ file.end('world!');
 ```
 
 ##### writable.setDefaultEncoding(encoding)
+<!-- YAML
+added: v0.11.15
+-->
 
 * `encoding` {String} The new default encoding
 * Return: `this`
@@ -358,6 +388,9 @@ The `writable.setDefaultEncoding()` method sets the default `encoding` for a
 [Writable][] stream.
 
 ##### writable.uncork()
+<!-- YAML
+added: v0.11.2
+-->
 
 The `writable.uncork()` method flushes all data buffered since
 [`stream.cork()`][] was called.
@@ -391,6 +424,9 @@ process.nextTick(() => {
 ```
 
 ##### writable.write(chunk[, encoding][, callback])
+<!-- YAML
+added: v0.9.4
+-->
 
 * `chunk` {String|Buffer} The data to write
 * `encoding` {String} The encoding, if `chunk` is a String
@@ -516,10 +552,16 @@ require more fine-grained control over the transfer and generation of data can
 use the [`EventEmitter`][] and `readable.pause()`/`readable.resume()` APIs.
 
 #### Class: stream.Readable
+<!-- YAML
+added: v0.9.4
+-->
 
 <!--type=class-->
 
 ##### Event: 'close'
+<!-- YAML
+added: v0.9.4
+-->
 
 The `'close'` event is emitted when the stream and any of its underlying
 resources (a file descriptor, for example) have been closed. The event indicates
@@ -528,6 +570,9 @@ that no more events will be emitted, and no further computation will occur.
 Not all [Readable][] streams will emit the `'close'` event.
 
 ##### Event: 'data'
+<!-- YAML
+added: v0.9.4
+-->
 
 * `chunk` {Buffer|String|any} The chunk of data. For streams that are not
   operating in object mode, the chunk will be either a string or `Buffer`.
@@ -558,6 +603,9 @@ readable.on('data', (chunk) => {
 ```
 
 ##### Event: 'end'
+<!-- YAML
+added: v0.9.4
+-->
 
 The `'end'` event is emitted when there is no more data to be consumed from
 the stream.
@@ -578,6 +626,9 @@ readable.on('end', () => {
 ```
 
 ##### Event: 'error'
+<!-- YAML
+added: v0.9.4
+-->
 
 * {Error}
 
@@ -589,6 +640,9 @@ to push an invalid chunk of data.
 The listener callback will be passed a single `Error` object.
 
 ##### Event: 'readable'
+<!-- YAML
+added: v0.9.4
+-->
 
 The `'readable'` event is emitted when there is data available to be read from
 the stream. In some cases, attaching a listener for the `'readable'` event will
@@ -632,6 +686,9 @@ end
 preferred over the use of the `'readable'` event.
 
 ##### readable.isPaused()
+<!--
+added: v0.11.14
+-->
 
 * Return: {Boolean}
 
@@ -651,6 +708,9 @@ readable.isPaused() // === false
 ```
 
 ##### readable.pause()
+<!-- YAML
+added: v0.9.4
+-->
 
 * Return: `this`
 
@@ -672,6 +732,9 @@ readable.on('data', (chunk) => {
 ```
 
 ##### readable.pipe(destination[, options])
+<!-- YAML
+added: v0.9.4
+-->
 
 * `destination` {stream.Writable} The destination for writing data
 * `options` {Object} Pipe options
@@ -727,6 +790,9 @@ never closed until the Node.js process exits, regardless of the specified
 options.
 
 ##### readable.read([size])
+<!-- YAML
+added: v0.9.4
+-->
 
 * `size` {Number} Optional argument to specify how much data to read.
 * Return {String|Buffer|Null}
@@ -774,6 +840,9 @@ event will also be emitted.
 event has been emitted will return `null`. No runtime error will be raised.
 
 ##### readable.resume()
+<!-- YAML
+added: v0.9.4
+-->
 
 * Return: `this`
 
@@ -793,6 +862,9 @@ getReadableStreamSomehow()
 ```
 
 ##### readable.setEncoding(encoding)
+<!-- YAML
+added: v0.9.4
+-->
 
 * `encoding` {String} The encoding to use.
 * Return: `this`
@@ -825,6 +897,9 @@ readable.on('data', (chunk) => {
 ```
 
 ##### readable.unpipe([destination])
+<!-- YAML
+added: v0.9.4
+-->
 
 * `destination` {stream.Writable} Optional specific stream to unpipe
 
@@ -851,6 +926,9 @@ setTimeout(() => {
 ```
 
 ##### readable.unshift(chunk)
+<!-- YAML
+added: v0.9.11
+-->
 
 * `chunk` {Buffer|String} Chunk of data to unshift onto the read queue
 
@@ -911,6 +989,9 @@ appropriately, however it is best to simply avoid calling `readable.unshift()`
 while in the process of performing a read.
 
 ##### readable.wrap(stream)
+<!-- YAML
+added: v0.9.4
+-->
 
 * `stream` {Stream} An "old style" readable stream
 
@@ -943,6 +1024,9 @@ myReader.on('readable', () => {
 ### Duplex and Transform Streams
 
 #### Class: stream.Duplex
+<!-- YAML
+added: v0.9.4
+-->
 
 <!--type=class-->
 
@@ -956,6 +1040,9 @@ Examples of Duplex streams include:
 * [crypto streams][crypto]
 
 #### Class: stream.Transform
+<!-- YAML
+added: v0.9.4
+-->
 
 <!--type=class-->