Separate heading and subheading on slide 30
Typo
Correct spelling mistakes
Fix lambda call according to style guide
Correct method name
Merge pull request #21 from AlexVPopov/03-typos-refactoring

03 typos refactoring
Merge pull request #22 from AngelVenchev/patch-1

Fix style and spelling mistakes in lecture 3
Fix small inaccuracies
Merge pull request #24 from GeorgeSG/minor-fixes

Fix small inaccuracies