Adding semicolons to println example
Adding semicolons to println example

Copying and pasting these lines results in a compilation error unless semicolons are added.
This wasn't immediately obvious from the error message.

chriskrycho/rust-by-example,mdinger/rust-by-example,chriskrycho/rust-by-example,mdinger/rust-by-example,realcr/rust-by-example,realcr/rust-by-example