Fix 5 typos
Lecture 04
Fix some typos
Merge pull request #29 from Monika-Ilieva/lecutre-02-conditions-arrays

Fix 5 typos
Fix indentation and typo
Merge pull request #30 from EmanuelaMollova/04-fix-typos

Fix some typos
Merge pull request #31 from NikolayGenov/04-fix-typos

Fix some typos and indentation
Fix 2 typos
Merge pull request #32 from Monika-Ilieva/03-hashes-methods-objects-classes

Fix 2 typos
Replace albino with pygments.rb

Albino seems to be deprecated in favor of pygments.rb. The latter is
also faster than albino–on my machine that's nearly twice as fast.