DOCS: Add "python -m sounddevice" to README

Author: mgeier

README.rst

@@ -199,6 +199,10 @@ Device Selection
 In many cases, the default input/output device(s) will be the one(s) you want,
 but it is of course possible to choose a different device.
 Use `sounddevice.query_devices()` to get a list of supported devices.
+The same list can be obtained from a terminal by typing the command ::
+
+   python -m sounddevice
+
 You can use the corresponding device ID to select a desired device by assigning
 to `sounddevice.default.device` or by passing it as *device* argument to
 `sounddevice.play()`, `sounddevice.Stream()` etc.

sounddevice.py

@@ -543,11 +543,11 @@ def query_devices(index=None):
 
     Notes
     -----
-    The list of devices can also be printed in a terminal:
+    The list of devices can also be displayed in a terminal:
 
     .. code-block:: sh
 
-        $ python -m sounddevice
+        python -m sounddevice
 
     Examples
     --------