access/alsa.c: format 'araw' is not specific enough

The codec format 'araẃ' is a vlc internal codec that selects the
araw audio decoder. It does not specify the bits per sample.

modules/access/alsa.c

@@ -72,7 +72,7 @@ static void DemuxClose( vlc_object_t * );
 
 #define FORMAT_TEXT N_( "Format" )
 #define FORMAT_LONGTEXT N_( \
-    "Sample format FOURCC (eg: araw, s8, s16l, s24l, s32l, f64l)" )
+    "Sample format FOURCC (eg: s8, s16l, s24l, s32l, f64l)" )
 
 #define SAMPLERATE_TEXT N_( "Samplerate" )
 #define SAMPLERATE_LONGTEXT N_( \
@@ -104,7 +104,7 @@ vlc_module_begin()
 
     add_bool( CFG_PREFIX "stereo", true, NULL, STEREO_TEXT, STEREO_LONGTEXT,
                 true )
-    add_string( CFG_PREFIX "format", "araw", NULL, FORMAT_TEXT,
+    add_string( CFG_PREFIX "format", "s16l", NULL, FORMAT_TEXT,
                 FORMAT_LONGTEXT, true )
     add_integer( CFG_PREFIX "samplerate", 48000, NULL, SAMPLERATE_TEXT,
                 SAMPLERATE_LONGTEXT, true )