COMP: LBFGSOptimizerBasev4 explicit Doxygen link request.

Avoid "::" for documentation, which is interpreted by Doxygen a class member.

Change-Id: If06ed8674de0e065193126bda1f2f66a74181024
Co-authored-by: Ali Ghayoor <ali-ghayoor@uiowa.edu>
Merge topic 'updatetransform-doxy'

4fb6c97a COMP: LBFGSOptimizerBasev4 explicit Doxygen link request.