In the version 1.9.0 the setting `COLS_IN_ALPHA_INDEX` has been made obsolete and generates a warning during building.
As the default value is used it can also be removed (doxygen will automatically take the default value in the older versions).
Due to some subtle interactions between used doxygen commands and the defined `\cgalAdvancedEnd` incorrect HTML code is generated.
This was shown by `xmllint (and some options) as
```
parser error : Opening and ending tag mismatch: div line</td></tr>
```
With the `\noop` "trick" this can here be overcome.
The presented output though looked OK.