Restore [] where default arguments are not keywords

Reverts some changes of d13fdd97cc8e.
diff --git a/Doc/library/ossaudiodev.rst b/Doc/library/ossaudiodev.rst
index fbbda26..cf302cc 100644
--- a/Doc/library/ossaudiodev.rst
+++ b/Doc/library/ossaudiodev.rst
@@ -277,7 +277,7 @@
 simple calculations.
 
 
-.. method:: oss_audio_device.setparameters(format, nchannels, samplerate, strict=False)
+.. method:: oss_audio_device.setparameters(format, nchannels, samplerate[, strict=False])
 
    Set the key audio sampling parameters---sample format, number of channels, and
    sampling rate---in one method call.  *format*,  *nchannels*, and *samplerate*