Port changes from https://github.com/Microsoft/TypeScript-Handbook/pull/24
Port changes from https://github.com/Microsoft/TypeScript-Handbook/pull/24

gooddaytoday/TypeScript-Handbook-RU,zspitz/TypeScript-Handbook,LearnShare/TypeScript-Handbook,mahp/TypeScript-Handbook,drmacm/TypeScript-Handbook,Microsoft/TypeScript-Handbook