help string on key stuff

[mdsumner]

This doesn't work:

 help(ceramic::get_api_key)

but this does:

?ceramic::get_api_key

Also fix "permanently" typo:

ceramic/R/provider-mapbox.R

Lines 5 to 13 in 985f7a7

	instruct_on_key_creation <- function(api = "mapbox") {
	if (api == "mapbox") {
	out <- paste(sprintf("To set your Mapbox API key obtain a key from %s\n", token_url()),
	sprintf("1) Run this to set for the session 'Sys.setenv(MAPBOX_API_KEY=<yourkey>)'\n\nOR,\n\n2) To set peramanently store 'MAPBOX_API_KEY=<yourkey>' in ~/.Renviron\n\nSee 'help(ceramic::get_api_key)'"), sep = "\n")
	} else {
	message(sprintf("don't know if key is needed for %s", api))
	}
	out
	}