Revert "Final changes to py2help new (#2516)"

build/misc/argparse2help.py

cmake/modules/RootNewMacros.cmake

core/base/CMakeLists.txt

core/base/inc/CommandLineOptionsHelp.h

core/base/src/TApplication.cxx

core/base/src/root-argparse.py

core/dictgen/CMakeLists.txt

core/dictgen/src/rootcling-argparse.py

core/dictgen/src/rootcling_impl.cxx

main/CMakeLists.txt

main/src/hadd-argparse.py

main/src/hadd.cxx

man/man1/hadd.1

man/man1/hist2workspace.1

man/man1/root.1

roofit/histfactory/CMakeLists.txt

roofit/histfactory/src/hist2workspace-argparse.py

roofit/histfactory/src/hist2workspace.cxx

rootx/CMakeLists.txt

rootx/src/rootx.cxx