Fix typo in config file

sdcard/mt32-pi.cfg

@@ -147,7 +147,7 @@ resampler_quality = good
 # The MT-32 uses an unusual MIDI channel assignment by default. On a real MT-32
 # this is set using a button combination. Use this option to change the initial
 # channel assignment on startup.
-
+#
 # Values: standard*, alternate
 #
 # standard:  Parts 1-8 = MIDI channels 2-9, Rhythm part = MIDI channel 10