Command ranking by literal phrase length. We prefer interpretations that treat less text as uninterpreted literal text. By "less text," we simply mean that one has a shorter string treated as literal text than the other. (We prefer shorter literals because when the parser matches a string of literal text, it's essentially throwing up its hands and admitting it can't parse the text; so the less text is contained in literals, the more text the parser is actually parsing, and more parsed is better.)

rankByLiteralLength :   CommandRankingCriterion