Move common setID() member from derived classes into
the base class allows for making the _id member private.

Access through getID() in two occasions for in gmsh and gocad
IO interface functions.

Mostly in the file headers.

find *Lib -type f | xargs sed -i 'N;s%^\s\+\*\n\(\s\+\*/\)%\1%'

Also those where the second and so forth arguments are defaulted.

The MathLib::TemplateVector3 is an exception, because of the many
required changes through the code, which relies on the implicit
conversion from TemplatePoint<T, 3> to TemplateVector3<T>.

clang-tidy '*explicit*' check.

Clang format run on near-the-header lines.

Happy New Year