Doc fix for root_group=None behaviour

Author: RetiredWizard

shared-bindings/displayio/Display.c

@@ -426,7 +426,7 @@ MP_PROPERTY_GETTER(displayio_display_bus_obj,
 
 //|     root_group: Group
 //|     """The root group on the display.
-//|     If the root group is set to ``None``, the default CircuitPython terminal will be shown.
+//|     If the root group is set to ``None``, no output will be shown.
 //|     """
 STATIC mp_obj_t displayio_display_obj_get_root_group(mp_obj_t self_in) {
     displayio_display_obj_t *self = native_display(self_in);

shared-bindings/displayio/EPaperDisplay.c

@@ -384,7 +384,7 @@ MP_PROPERTY_GETTER(displayio_epaperdisplay_bus_obj,
 
 //|     root_group: Group
 //|     """The root group on the epaper display.
-//|     If the root group is set to ``None``, the default CircuitPython terminal will be shown.
+//|     If the root group is set to ``None``, no output will be shown.
 //|     """
 //|
 STATIC mp_obj_t displayio_epaperdisplay_obj_get_root_group(mp_obj_t self_in) {

shared-bindings/framebufferio/FramebufferDisplay.c

@@ -323,8 +323,9 @@ STATIC mp_obj_t framebufferio_framebufferdisplay_obj_fill_row(size_t n_args, con
 MP_DEFINE_CONST_FUN_OBJ_KW(framebufferio_framebufferdisplay_fill_row_obj, 1, framebufferio_framebufferdisplay_obj_fill_row);
 
 //|     root_group: displayio.Group
-//|     """The root group on the display."""
-//|
+//|     """The root group on the display.
+//|     If the root group is set to ``None``, no output will be shown.
+//|     """
 STATIC mp_obj_t framebufferio_framebufferdisplay_obj_get_root_group(mp_obj_t self_in) {
     framebufferio_framebufferdisplay_obj_t *self = native_display(self_in);
     return common_hal_framebufferio_framebufferdisplay_get_root_group(self);