Don't overwrite --detailed when given by the user.
Don't overwrite --detailed when given by the user.

See https://twitter.com/Nymphium/status/580098018201882624

starius/luarocks,lxbgit/luarocks,robooo/luarocks,tst2005/luarocks,xpol/luavm,ignacio/luarocks,robooo/luarocks,xpol/luavm,xpol/luavm,ignacio/luarocks,robooo/luarocks,xpol/luarocks,keplerproject/luarocks,ignacio/luarocks,coderstudy/luarocks,robooo/luarocks,tst2005/luarocks,usstwxy/luarocks,xiaq/luarocks,lxbgit/luarocks,aryajur/luarocks,xpol/luarocks,starius/luarocks,xpol/luainstaller,keplerproject/luarocks,xpol/luainstaller,aryajur/luarocks,tst2005/luarocks,luarocks/luarocks,rrthomas/luarocks,xiaq/luarocks,keplerproject/luarocks,rrthomas/luarocks,usstwxy/luarocks,aryajur/luarocks,xpol/luainstaller,usstwxy/luarocks,coderstudy/luarocks,xpol/luavm,keplerproject/luarocks,ignacio/luarocks,xpol/luarocks,starius/luarocks,coderstudy/luarocks,tarantool/luarocks,coderstudy/luarocks,rrthomas/luarocks,rrthomas/luarocks,tarantool/luarocks,xpol/luarocks,lxbgit/luarocks,aryajur/luarocks,xpol/luavm,xiaq/luarocks,xpol/luainstaller,luarocks/luarocks,tarantool/luarocks,xiaq/luarocks,lxbgit/luarocks,tst2005/luarocks,starius/luarocks,luarocks/luarocks,usstwxy/luarocks