This allows a double-click on the path in a terminal to select the
whole path. Otherwise the leading '-' character is also included in
the copied path.
```
New output:
./busctl tree org.freedesktop.network1
`- /org
`- /org/freedesktop
|- /org/freedesktop/LogControl1
`- /org/freedesktop/network1
|- /org/freedesktop/network1/link
| |- /org/freedesktop/network1/link/_31
| |- /org/freedesktop/network1/link/_32
```
n++;
}
- printf("%s%s%s\n",
+ printf("%s%s %s\n",
prefix,
special_glyph(has_more ? SPECIAL_GLYPH_TREE_BRANCH : SPECIAL_GLYPH_TREE_RIGHT),
*l);