syntax_data: {"ast_node_type":"other","tokens":[{"end":29,"kind":"keyword","start":0,"text":"assert_eq!(loc1.line,"}]}
source_snippet:     assert_eq!(loc1.line, 2);
context_before:     assert_eq!(loc1.file.name, PathBuf::from("blork.rs").into());
context_after:     assert_eq!(loc1.col, CharPos(10));