[Rd] disappearing paragraphs in html rendering of text from Rd macros

[Martin Maechler]

>>>>> Georgi Boshnakov 
>>>>>     on Mon, 29 Oct 2018 08:57:50 +0000 writes:

> 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 

[..................]

> Georgi Boshnakov

Thank you.  I can reproduce what you report, thanks to your
'reprex', and will have a look in order to fix this regression
in R-devel.

Martin Maechler