Hide maybe_print_mailer_installation_instructions/1 from docs (#4731)
Hide maybe_print_mailer_installation_instructions/1 from docs (#4731)


phoenixframework/phoenix,optikfluffel/phoenix,rafbgarcia/phoenix,phoenixframework/phoenix,phoenixframework/phoenix,nshafer/phoenix,nshafer/phoenix,rafbgarcia/phoenix,optikfluffel/phoenix,0x00evil/phoenix,0x00evil/phoenix,nshafer/phoenix,0x00evil/phoenix,optikfluffel/phoenix,rafbgarcia/phoenix