DOC: re-enable syntax highlighting for included example code

doc/examples.rst

@@ -6,73 +6,84 @@ Play a Sound File
 :gh-example:`play_file.py`
 
 .. literalinclude:: ../examples/play_file.py
+    :language: python
 
 Play a Very Long Sound File
 ---------------------------
 
 :gh-example:`play_long_file.py`
 
 .. literalinclude:: ../examples/play_long_file.py
+    :language: python
 
 Play a Very Long Sound File without Using NumPy
 -----------------------------------------------
 
 :gh-example:`play_long_file_raw.py`
 
 .. literalinclude:: ../examples/play_long_file_raw.py
+    :language: python
 
 Play a Web Stream
 -----------------
 
 :gh-example:`play_stream.py`
 
 .. literalinclude:: ../examples/play_stream.py
+    :language: python
 
 Play a Sine Signal
 ------------------
 
 :gh-example:`play_sine.py`
 
 .. literalinclude:: ../examples/play_sine.py
+    :language: python
 
 Input to Output Pass-Through
 ----------------------------
 
 :gh-example:`wire.py`
 
 .. literalinclude:: ../examples/wire.py
+    :language: python
 
 Plot Microphone Signal(s) in Real-Time
 --------------------------------------
 
 :gh-example:`plot_input.py`
 
 .. literalinclude:: ../examples/plot_input.py
+    :language: python
 
 Real-Time Text-Mode Spectrogram
 -------------------------------
 
 :gh-example:`spectrogram.py`
 
 .. literalinclude:: ../examples/spectrogram.py
+    :language: python
 
 Recording with Arbitrary Duration
 ---------------------------------
 
 :gh-example:`rec_unlimited.py`
 
 .. literalinclude:: ../examples/rec_unlimited.py
+    :language: python
 
 Using a stream in an `asyncio` coroutine
 ----------------------------------------
 
 :gh-example:`asyncio_coroutines.py`
 
 .. literalinclude:: ../examples/asyncio_coroutines.py
+    :language: python
 
 Creating an `asyncio` generator for audio blocks
 ------------------------------------------------
 
 :gh-example:`asyncio_generators.py`
 
 .. literalinclude:: ../examples/asyncio_generators.py
+    :language: python