Merge pull request #3678 from nateprewitt/3675_streaming_docs

decoding fix for Streaming Requests docs

docs/user/advanced.rst

@@ -495,6 +495,21 @@ set ``stream`` to ``True`` and iterate over the response with
     for line in r.iter_lines():
 
         # filter out keep-alive new lines
+        if line:
+            decoded_line = line.decode('utf-8')
+            print(json.loads(decoded_line))
+
+When using `decode_unicode=True` with
+:meth:`Response.iter_lines() <requests.Response.iter_lines>` or
+:meth:`Response.iter_content() <requests.Response.iter_content>`, you'll want
+to provide a fallback encoding in the event the server doesn't provide one::
+
+    r = requests.get('http://httpbin.org/stream/20', stream=True)
+
+    if r.encoding is None:
+        r.encoding = 'utf-8'
+
+    for line in r.iter_lines(decode_unicode=True):
         if line:
             print(json.loads(line))