patch: "speller/algebra/+": - derive/^([zcs])h/$1/ - derive/^([zcs])([^h])/$1h$2/ - derive/ang$/an/ - derive/an$/ang/ - derive/eng$/en/ - derive/en$/eng/ - derive/in$/ing/ - derive/ing$/in/ - derive/ian$/iang/ - derive/iang$/ian/ - derive/uan$/uang/ - derive/uang$/uan/ - derive/ong$/on/ - derive/on$/ong/
