ANSI escape sequences (tree)

I understand mosh does something with respect to ANSI escape sequences, but I don't quite understand it. Using ssh, running the 'tree' command looks like this:

$ tree
.
├── [   0]  one
├── [   0]  three
└── [   0]  two

0 directories, 3 files

But, through mosh, it looks like this:

$ tree
.
tqq [   0]  one
tqq [   0]  three
mqq [   0]  two

0 directories, 3 files

Is there something I can do to make this display properly?

-Mike

Reproduce the differing tree output over SSH and Mosh, using the ANSI escape sequence behavior described in the issue as the starting point. Trace how Mosh handles the tree characters and terminal output; done means the tree displays the same box-drawing characters through Mosh as it does through SSH.