Vignette for distributions gives wrong transform for location for Generalised Gamma (Prentice)

[heor-robyoung]

The distributions vignette gives the following description of the log-mean of the generalised gamma:

However, the linear predictor is not exponentiated in practice, as mu is unbounded and the distribution list shows that it has identity transform:

[chjackson]

Thanks, fixed in https://github.com/chjackson/flexsurv-dev/commit/d5b414e1b08e49b5f5dd794801c5602e6112d7ec .