packages functions content are missing in r-base-html

[Benjamin]

r-base-html package contains only packages root HTML pages.

For example, function definition links of the `stats` package HTML file located at

<file:///usr/lib/R/library/stats/html/00Index.html> are broken. Some broken links:

<file:///usr/lib/R/library/stats/html/acf.html>, <file:///usr/lib/R/library/stats/html/acf2AR.html> etc.

$ lsb_release -rd
Description: Ubuntu 16.04.4 LTS
Release: 16.04

$ apt-cache policy r-base-html
r-base-html:
  Installed: 3.2.3-4
  Candidate: 3.2.3-4
  Version table:
 *** 3.2.3-4 500
        500 http://fr.archive.ubuntu.com/ubuntu xenial/universe amd64 Packages
        500 http://fr.archive.ubuntu.com/ubuntu xenial/universe i386 Packages
        100 /var/lib/dpkg/status

What to expect:

Broken links fixed / missing packages functions definitions pages included

What happened instead:

Packages functions definitions HTML pages are missing, links on the package root documentation page are broken.