Bug#884402: sonic-pi: please make the documentation build reproducible

[Chris Lamb]

forwarded 884402 https://github.com/samaaron/sonic-pi/pull/1778
thanks

I've forwarded this upstream here:

  https://github.com/samaaron/sonic-pi/pull/1778


Regards,

-- 
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     : :'  :     Chris Lamb
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