Unicode characters not being rendered in tutorials

[dwolf]

In the tutorials, the box drawing Unicode characters aren’t being rendered. For example, instead of this:

helloWorld/
╠══ helloComponent/
║   ╠══ Component.cdef
║   ╚══ helloWorld.c
╚══ helloWorld.adef

helloWorld - Legato Docs displays this:

helloWorld/
├── helloComponent/
│   ├── Component.cdef
│   └── helloWorld.c
└── helloWorld.adef