Deletes all editable text in the given range.
Calls [[email protected]] for each editable sub-range of [start,end). start and
end are revalidated to point to the location of the last deleted range, or left untouched if no text was deleted.
| this |
a `GtkTextBuffer` |
| start_iter |
start of range to delete |
| end_iter |
end of range |
| default_editable |
whether the buffer is editable by default |
|
whether some text was actually deleted |