[README] Fix code rendering

README.md

@@ -529,51 +529,51 @@ youtube-dl makes the best effort to be a good command-line program, and thus sho
 
 From a Python program, you can embed youtube-dl in a more powerful fashion, like this:
 
-    ```python
+```python
-    import youtube_dl
+import youtube_dl
 
-    ydl_opts = {}
+ydl_opts = {}
-    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
+with youtube_dl.YoutubeDL(ydl_opts) as ydl:
-        ydl.download(['http://www.youtube.com/watch?v=BaW_jenozKc'])
+    ydl.download(['http://www.youtube.com/watch?v=BaW_jenozKc'])
-    ```
+```
 
 Most likely, you'll want to use various options. For a list of what can be done, have a look at [youtube_dl/YoutubeDL.py](https://github.com/rg3/youtube-dl/blob/master/youtube_dl/YoutubeDL.py#L69). For a start, if you want to intercept youtube-dl's output, set a `logger` object.
 
 Here's a more complete example of a program that outputs only errors (and a short message after the download is finished), and downloads/converts the video to an mp3 file:
 
-    ```python
+```python
-    import youtube_dl
+import youtube_dl
 
 
-    class MyLogger(object):
+class MyLogger(object):
-        def debug(self, msg):
+    def debug(self, msg):
-            pass
+        pass
 
-        def warning(self, msg):
+    def warning(self, msg):
-            pass
+        pass
 
-        def error(self, msg):
+    def error(self, msg):
-            print(msg)
+        print(msg)
 
 
-    def my_hook(d):
+def my_hook(d):
-        if d['status'] == 'finished':
+    if d['status'] == 'finished':
-            print('Done downloading, now converting ...')
+        print('Done downloading, now converting ...')
 
 
-    ydl_opts = {
+ydl_opts = {
-        'format': 'bestaudio/best',
+    'format': 'bestaudio/best',
-        'postprocessors': [{
+    'postprocessors': [{
-            'key': 'FFmpegExtractAudio',
+        'key': 'FFmpegExtractAudio',
-            'preferredcodec': 'mp3',
+        'preferredcodec': 'mp3',
-            'preferredquality': '192',
+        'preferredquality': '192',
-        }],
+    }],
-        'logger': MyLogger(),
+    'logger': MyLogger(),
-        'progress_hooks': [my_hook],
+    'progress_hooks': [my_hook],
-    }
+}
-    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
+with youtube_dl.YoutubeDL(ydl_opts) as ydl:
-        ydl.download(['http://www.youtube.com/watch?v=BaW_jenozKc'])
+    ydl.download(['http://www.youtube.com/watch?v=BaW_jenozKc'])
-    ```
+```
 
 # BUGS