Recent changes in R-devel seem to change the HTML rendering of text returned by Rd macros, in that now empty lines do not cause paragraphs to end (the empty lines are kept but <p> tags are not set). As a result, multiple paragraphs are output as a single one.
A complete example Rd file is at: https://github.com/GeoBosh/reprexes/blob/master/disappearingParagraphs/a.Rd rendered (2018-10-28) with R-devel: https://github.com/GeoBosh/reprexes/blob/master/disappearingParagraphs/a.html and R-3.5.1patched: https://github.com/GeoBosh/reprexes/blob/master/disappearingParagraphs/a351.html The exact system information used for rendering is in the above html files. In essence, the following: \newcommand{\abc}{\Sexpr[stage=build,results=rd]{paste0(letters[1:4], collapse = "\n\n")}} produces in R-devel something like <p>a b c d</p> where the empty lines may be distorted in this email, while in R-3.5.1 the empty lines cause paragraph tags around each chunk: <p>a</p> <p>b</p> <p>c</p> <p>d</p> Directly embedding the Sexpr in the Rd file also produces all <p> tags in R-devel and R-3.5.1patched., --- Georgi Boshnakov ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel