print-flat-tree
Converts a flat-tree to a string

USAGE:
    print-flat-tree [tree]...

FLAGS:
    -h, --help       Prints help information
    -V, --version    Prints version information

ARGS:
    <tree>...    For example '0 1 2 3 7 8 9 10'

print-flat-tree 0 1 2 3 7 8 9 10 11 12 13 14

  0──┐
     1──┐
  2──┘  │
        3──┐
           │
           │
           │
           7
  8──┐     │
     9──┐  │
 10──┘  │  │
       11──┘
 12──┐  │
    13──┘
 14──┘