Removed multistream prettyPrint deprecation and clean up docs (#1123)

* Removed multistream prettyPrint deprecation and clean up docs

* Update docs/api.md

Co-authored-by: James Sumners <james@sumners.email>

Co-authored-by: James Sumners <james@sumners.email>

docs/api.md

@@ -453,9 +453,6 @@ set on the `destination` object after each log line is written:
 * the last logger instance as `destination.lastLogger` (to support child
   loggers)
 
-For a full reference for using `Symbol.for('pino.metadata')`, see the [`pino-multi-stream` ⇗](https://github.com/pinojs/pino-multi-stream)
-module.
-
 The following is a succinct usage example:
 
 ```js
@@ -470,8 +467,6 @@ console.log(
 ) // Logged message "hi" at level 30 with object { a: 1 } at time 1531590545089
 ```
 
-* See [`pino-multi-stream` ⇗](https://github.com/pinojs/pino-multi-stream)
-
 <a id="logger"></a>
 ## Logger Instance
 
@@ -1056,8 +1051,10 @@ Create a stream composed by multiple destination streams:
 ```js
 var fs = require('fs')
 var pino = require('pino')
+var pretty = require('pino-pretty')
 var streams = [
   {stream: fs.createWriteStream('/tmp/info.stream.out')},
+  {stream: pretty() },
   {level: 'debug', stream: fs.createWriteStream('/tmp/debug.stream.out')},
   {level: 'fatal', stream: fs.createWriteStream('/tmp/fatal.stream.out')}
 ]
@@ -1080,7 +1077,7 @@ In order for `multistream` to work, the log level __must__ be set to the lowest
 
 + `dedupe`: Set this to `true` to send logs only to the stream with the higher level. Default: `false`
 
-    `dedupe` flag can be useful for example when using pino-multi-stream to redirect `error` logs to `process.stderr` and others to `process.stdout`:
+    `dedupe` flag can be useful for example when using `pino.multistream` to redirect `error` logs to `process.stderr` and others to `process.stdout`:
 
     ```js
     var pino = require('pino')

test/multistream.test.js

@@ -7,6 +7,8 @@ const os = require('os')
 const test = require('tap').test
 const pino = require('../')
 const multistream = pino.multistream
+const proxyquire = require('proxyquire')
+const strip = require('strip-ansi')
 
 test('sends to multiple streams using string levels', function (t) {
   let messageCount = 0
@@ -213,23 +215,24 @@ test('supports custom levels', function (t) {
 })
 
 test('supports pretty print', function (t) {
+  t.plan(2)
   const stream = writeStream(function (data, enc, cb) {
-    t.not(data.toString().match(/INFO.*: pretty print/), null)
-    t.end()
+    t.not(strip(data.toString()).match(/INFO.*: pretty print/), null)
     cb()
   })
-  const outStream = pino({
-    prettyPrint: {
-      levelFirst: true,
-      colorize: false
+
+  const pretty = proxyquire('pino-pretty', {
+    'sonic-boom': function () {
+      t.pass('sonic created')
+      return stream
     }
-  }, stream)
+  })
 
   const log = pino({
     level: 'debug',
     name: 'helloName'
   }, multistream([
-    { stream: outStream[pino.symbols.streamSym] }
+    { stream: pretty() }
   ]))
 
   log.info('pretty print')