BTW, the only regression with this is that [select] object complains it
does not understand "bang." I've patched it so that when it receives a
bang it redirects it to sel1_symbol and sel2_symbol with a
gensym("bang"). This also means that [sel b] would not work for bangs,
but [sel bang] will. I think that makes sense since someone might want
to select letter "b."