syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"assert_eq!(edit_distance(\"abc\","}]}
source_snippet:     assert_eq!(edit_distance("abc", "abcd", 0), None);
context_before:     assert_eq!(edit_distance("abc", "abcd", 1), Some(1));
context_after:     assert_eq!(edit_distance("abc", "xyz", 3), Some(3));