3.7.90
======
* Updates to Python demos (Marta Maria Casetti)
* Fixed incorrect value in Guitar Tuner demo, #687628 (Tiffany Antopolski)
* Various typo fixes (Daniel Mustieles)
* Updated translations:
  el    (Tom Tryfonidis, Dimitris Spingos)
  es    (Nicolás Satragno, Daniel Mustieles)
  pt_BR (Enrico Nicoletto)