Hiragana spelled out 42 doubled syllables (kka, ssha, ttsu, ...) and so
knew none it did not list: matcha, baggu and beddo came out as ma-tc-ha,
ba-gg-u. Katakana already used the engine's small-tsu rule for a few
doubles. Both maps now list every doubled consonant but n, plus tch, and
hiragana gains di, che and fa/fi/fe/fo like katakana.
