[Accepted] SE-0039: Modernizing Playground Literals

What to do with #setline without arguments? #resetSourceLocation? Or just

Relatedly, the core team discussed changing #setline to follow camel case

as well. As was brought up on another thread, the syntax for #setline is
inconsistent with the other # directives because it doesn’t use
parentheses. The core team discussed this a bit and recommends resyntaxing
#setline to:
#sourceLocation(file: "foo", line: 42)

- Anton