Improve documentation on "SyntaxError" to take Python 3.x into account

index.html

@@ -27,7 +27,7 @@
 
 <p>After that, you should be able to call it from the command line as <em>youtube-dl</em> or <em>youtube-dl.py</em>. I will use <em>youtube-dl</em> in the following examples. Usage instructions are easy. Use <em>youtube-dl</em> followed by a video URL or identifier. Example: <em>youtube-dl "http://www.youtube.com/watch?v=foobar"</em>. The video will be saved to the file <em>foobar.flv</em> in that example. As YouTube.com videos are usually in Flash Video format, their extension should be <em>flv</em>. In Linux and other unices, video players using a recent version of <em>ffmpeg</em> can play them. That includes VLC, MPlayer, etc. Those two work under Windows and other platforms, but you could also get a specific FLV player of your taste.</p>
 
-<p>If you try to run the program and you receive an error message containing the keyword <em>SyntaxError</em> near the end, it means your Python interpreter is too old.</p>
+<p>If you try to run the program and you receive an error message containing the keyword <em>SyntaxError</em> near the end, it means your Python interpreter is too old or from the 3.x branch.</p>
 
 <h2>More usage tips</h2>
 

index.html.in

@@ -27,7 +27,7 @@
 
 <p>After that, you should be able to call it from the command line as <em>youtube-dl</em> or <em>youtube-dl.py</em>. I will use <em>youtube-dl</em> in the following examples. Usage instructions are easy. Use <em>youtube-dl</em> followed by a video URL or identifier. Example: <em>youtube-dl "http://www.youtube.com/watch?v=foobar"</em>. The video will be saved to the file <em>foobar.flv</em> in that example. As YouTube.com videos are usually in Flash Video format, their extension should be <em>flv</em>. In Linux and other unices, video players using a recent version of <em>ffmpeg</em> can play them. That includes VLC, MPlayer, etc. Those two work under Windows and other platforms, but you could also get a specific FLV player of your taste.</p>
 
-<p>If you try to run the program and you receive an error message containing the keyword <em>SyntaxError</em> near the end, it means your Python interpreter is too old.</p>
+<p>If you try to run the program and you receive an error message containing the keyword <em>SyntaxError</em> near the end, it means your Python interpreter is too old or from the 3.x branch.</p>
 
 <h2>More usage tips</h2>