Merge pull request #2879 from owenniblock/docs/midi-pc-duplicate-example

adds port example to midi_pc docs

Author: samaaron

app/server/ruby/lib/sonicpi/lang/midi.rb

@@ -737,7 +737,7 @@ def midi_pc(*args)
         nil
       end
       doc name:           :midi_pc,
-          introduced:     Version.new(3,0,2),
+          introduced:     Version.new(3,1,0),
           summary:        "Send MIDI program change message",
           args:           [[:program_num, :midi]],
           returns:        :nil,
@@ -756,7 +756,7 @@ def midi_pc(*args)
         "midi_pc 100  #=> Sends MIDI pc message to all ports and channels",
         "midi_pc :e7  #=> Sends MIDI pc message to all ports and channels",
         "midi_pc 100, channel: 5  #=> Sends MIDI pc message on channel 5 to all ports",
-        "midi_pc 100, channel: 5  #=> Sends MIDI pc message on channel 5 to all ports",
+        "midi_pc 100, port: [\"foo\", \"bar\"], channel: 5  #=> Sends MIDI pc message on channel 5 to ports named \"foo\" and \"bar\"",
         "midi_pc 100, channel: [1, 5]  #=> Sends MIDI pc message on channel 1 and 5 to all ports"
 ]