Consistent code style

[craigayre]

Variables

• Use camelCase consistently (exception: array_n_element, refactored in another upcoming PR)

Semicolons

• Use semicolons consistently at EOL
• Remove semicolons after function definition

Comparison operators

• Always use === and !==

Comments

• Capitalize the first letter of comments
• Have space after comment delimiter

[kennymkchan]

Thanks for doing this! This looks good to me! 🥘 😄 🚢 Shipping it.