(command.CommandList children: [ (C {(KW_Set set)} {(-e)}) (C {(git)} {(log)} {(--grep) (Lit_Equals '=') (SQ <'^ARROW-[0-9]*:.*'>)} {(-n1)} {(--pretty) (Lit_Equals '=') (format) (Lit_Other ':') (Lit_Other '%') (H)} ) ] )