Add "make format" to Lua script

All hard-coded but the format stuff is a one-off so reasonable.


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4860 de43f980-851b-0410-b2f7-c40aca1f87e0
Help should cover "make format"


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4861 de43f980-851b-0410-b2f7-c40aca1f87e0