take out the sbm_prior from the bgmCompare documentation

[sekulovskin]

Description

The documentation for bgmCompare listed the sbm_prior as one of the options for the difference_prior argument. I assume this was generically written based on the documentation for bgm. Therefore I took it out from the documerntation.

You can also see that this should not be the case since running:

x = Boredom[Boredom$language == "fr", 2:6]
y = Boredom[Boredom$language != "fr", 2:6]

fit = bgmCompare(x, y, chains = 2, 
                 difference_prior = sbm_prior()
)

gives

Error in match.arg(difference_prior) : 
  'arg' should be one of “Bernoulli”, “Beta-Bernoulli”
Called from: match.arg(difference_prior)

[MaartenMarsman]

It was intended to work with sbm (it should be plug and play). Fixed it now. Can you verify?

[sekulovskin]

It was intended to work with sbm (it should be plug and play). Fixed it now. Can you verify?

Confirmed!