[NTG-context] How to display these characters

[juh+ntg-context at mailbox.org]

Dear all,

I have this:


\starttext

\starttyping
foo
└── bar
     ├── baz
     │   └── index.html
     └── index.html

\stoptyping

\stoptext

The source code is generated with the linux command "tree".

The special characters which indicate the folder depth are not displayed.

I guess that I could define a fallbackfont. Do anyone know the unicode 
range that should be covered and the font that has these characters?

TIA
juh