Explain how to fix homebrew to allow updates after editing formulae
Merge pull request #1001 from drdan14/homebrew-git-repair

  Explain how to fix homebrew to allow updates after editing formulae
[docs] Several documentation fixes

- Fix a typo and a path in MNIST tutorial
- Rework instructions about Fedora installation
Merge pull request #997 from ozancaglayn/dev

  [docs] Several documentation fixes
back-merge

  [docs] Several documentation fixes
  Explain how to fix homebrew to allow updates after editing formulae