Stub in sample heredoc code
Refactor/fix parser test for heredocs
Refactor Rip::Compiler::Parser#heredoc to correctly? produce multi-line strings
Add failing tests for heredoc parsing
Add test to cover premature heredoc termination
Add test to cover indented heredoc
Tag broken/working heredoc tests
Parse heredocs almost correctly
Parse heredocs correctly
Run all tests
Parse heredocs as double-quoted strings