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A general description is here.
The parser now incorporates code from Romain Francois' parser package, to support more detailed computation on the code, such as syntax highlighting, comment-based documentation, etc.
‘R CMD check --as-cran’ notes ‘hidden’ files and directories (with names starting with a dot) that are not needed for the operation of ‘R CMD INSTALL’ or ‘R CMD build’: such files should be excluded from the published tarball.
‘Translation’ packages are defunct.
‘Translation’ packages are deprecated.