Capture and preserve location information more accurately
Use more accurate location information in syntax tree
Fix parsing for empty strings and regular expressions
Add coverage for empty literal in syntax tree to prevent regressions
Fix syntax tree for empty literals and improve node's location accuracy
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