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

Mostly in the file headers.

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

Fixes multiple copyright messages in the doxygen docu.

ag '\\file' -L --ignore=ThirdParty *Lib |xargs  sed -i 's/\(.*\)\\copyright/\1\\file\n\1\\copyright/'

Clang format run on near-the-header lines.

Happy New Year

See clang-tidy docu https://clang.llvm.org/extra/clang-tidy/checks/readability-simplify-boolean-expr.html

many are superfluous, some could be turned into
fwd decls, some wrongly documented.

The more general interfaces prevent some implicit conversions with potential
insecure constructor.

The template arguments are matrix type and vector type. For new
matrix types it is necessary to specialize the template. This is
done for DenseMatrix as matrix type and double* as vector type.