syntax_data: {"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // Not unrestricted Damerau-Levenshtein distance.
context_before:     assert_ne!(edit_distance("ab", "ba", usize::MAX), Some(2));
context_after:     assert_ne!(edit_distance("abde", "bcaed", usize::MAX), Some(3));