Class OS shell open globalized path unnecessary?

**Your Godot version:** 3.2.3

**Issue description:**
I don't get what is supposed to mean:

> Use ProjectSettings.globalize_path to convert a res:// or user:// path into a system path for use with this method.

Both print the exact same path on both Windows and Android:
```
print("user dir: ", OS.get_user_data_dir())
print("globalized user dir: ", ProjectSettings.globalize_path(OS.get_user_data_dir()))
```
Same is true here:
```
print("system dir pictures: ", OS.get_system_dir(6))
print("globalized system dir pictures: ", ProjectSettings.globalize_path(OS.get_system_dir(6)))
```

**URL to the documentation page:**
https://docs.godotengine.org/en/stable/classes/class_os.html#class-os-method-shell-open