### Problem outputting inequalities

The following code :

```
x, y, z = var('x, y, z')
x < y < z
```

outputs :

```
x < y
```

but the "< z" seems to be taken into account, as in :

```
x, y, z = var('x, y, z')
x = 1; y = 2; z = 0
x < y < z
```

which prints "False".

Analogous behavior with :

```
x, y, z = var('x, y, z')
# x = 1; y = 0; z = 0;
x < y or x < z
```

Is there a way to make Sage prints the entire expression ?
It seems like a bug when printing expression containing multiple inequalities.