issue with lldb9 and python3.5

Is this a packaging issue? There are good reasons to use libedit as a
gnu readline replacement. I am not sure how complete it is here, but
there is definitely better licensing (at least from the GPLv3 vs GPLv2
incompatibility point of view - certain projects must use one version,
others the other one). If there are some nits in the readline compat,
better to fix the editline code for general benefit.