From a code perspective, this is identical to v1.7.2
The only significant change in this release is a change in documentation. Due to the package qdap no longer appearing on CRAN (at least at the time of this release), the documentation removes all references to the package, including comparisons of the qdap::mgsub function. Additionally, in an attempt to further lighten the package, the very minor performance comparison for the censoring function was removed so microbenchmark could be removed from the suggest as well.
These changes were necessitated by CRAN reaching out and requiring the removal of qdap from the suggests list.