Doxygen master 1.10.0 has support for the c++ concept of modules but as in the past doxygen used the term "modules" for the grouping of information (`commands like `\defgroup`, `\ingroup` etc.) an new term for the later has been introduced: Topics.
The introduction of the new term also has some influence on the generated files and file names.
The consequence of this is that part of CGAL documentation (i.e. the "Reference Manual") item didn't appear anymore in a.o. the treeview.
- creating a new setup
- adding the "topics" to the layout files as in the past the "modules" were.
- adjusting the "hack.js" where some manipulation of the TreeView is done and this had "modules" coded into it.
- adjusting the "header_packages.html" as this used the name "modules.js"
In the past it was possible by means of the option `-DCGAL_EXTRACT_ALL_NO_DETAILED_IF_EMPTY=OFF` with CMake to disable the specific CGAL setting though currently with the 1.8.13 version this didn't work (anymore).
Also the setting has been renamed for the 1.9.6 version (and newer) to `NO_ADDITIONAL_DETAILS` this has now been made more flexible as well.
When (re)generating the documentation from the sources and not using the, internally patched CGAL, doxygen version one gets messages about:
```
warning: ignoring unsupported tag 'EXTRACT_ALL_NO_DETAILED_IF_EMPTY'
```
By introducing the option `CGAL_EXTRACT_ALL_NO_DETAILED_IF_EMPTY` this doxygen setting can be steered
- option not supplied to cmake, will use as if specified `-DCGAL_EXTRACT_ALL_NO_DETAILED_IF_EMPTY=ON`
- option supplied to cmake as `-DCGAL_EXTRACT_ALL_NO_DETAILED_IF_EMPTY=ON` will write the line `EXTRACT_ALL_NO_DETAILED_IF_EMPTY = YES` in the doxygen configuration
- option supplied to cmake as `-DCGAL_EXTRACT_ALL_NO_DETAILED_IF_EMPTY=OFF` will write the line `#EXTRACT_ALL_NO_DETAILED_IF_EMPTY = NO` in the doxygen configuration, so just using the default setting of `NO` line could be omitted but it is better to have a placeholder
right after the merge of 4.14 release branch
+ manual fix on one line in:
* Arrangement_on_surface_2/include/CGAL/IO/Arr_text_formatter.h
* .travis/generate_travis.sh