Documentation corrections for GtkTextIter
| method | current | suggestion |
|------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------|-----------------------------------------------------------------|
| [backward_visible_cursor_position](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L3785) | "Moves @iter forward to the previous visible cursor position" | "Moves @iter backward to the previous visible cursor position." |
| [get_offset](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L595) | "Use [method@Gtk,TextBuffer.get_iter_at_offset]" | "Use [method@Gtk.TextBuffer.get_iter_at_offset]" |
| [starts_tag](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L1201) | "returns %TRUE, [method@Gtk.TextIter.has_tag" | "returns %TRUE, [method@Gtk.TextIter.has_tag] " |
| method | current | suggestion |
|--------------------------------------------------------------------------------------------------------|-----------------------------------------------------|-----------------------------------------------------------|
| [backward_cursor_position](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L3715) | "Like gtk_text_iter_forward_cursor_position()" | "Like [method@Gtk.TextIter.forward_cursor_position]" |
| [backward_find_char](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L4483) | "Same as gtk_text_iter_forward_find_char()" | "Same as [method@Gtk.TextIter.forward_find_char]" |
| [backward_search](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L5295) | "Same as gtk_text_iter_forward_search()" | "Same as [method@Gtk.TextIter.forward_search]" |
| [backward_sentence_starts](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L3611) | "Calls gtk_text_iter_backward_sentence_start()" | "Calls [method@Gtk.TextIter.backward_sentence_start]" |
| [backward_visible_word_starts](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L3421) | "Calls gtk_text_iter_backward_visible_word_start()" | "Calls [method@Gtk.TextIter.backward_visible_word_start]" |
| [backward_word_starts](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L3345) | "Calls gtk_text_iter_backward_word_start()" | "Calls [method@Gtk.TextIter.backward_word_start]" |
| [forward_sentence_ends](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L3591) | "Calls gtk_text_iter_forward_sentence_end()" | "Calls [method@Gtk.TextIter.forward_sentence_end]" |
| [forward_to_end](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L4131) | "gtk_text_iter_get_char() called on" | "[method@Gtk.TextIter.get_char] called on" |
| [forward_visible_word_ends](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L3403) | "Calls gtk_text_iter_forward_visible_word_end()" | "Calls [method@Gtk.TextIter.forward_visible_word_end]" |
| [forward_word_ends](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L3327) | "Calls gtk_text_iter_forward_word_end()" | " Calls [method@Gtk.TextIter.forward_word_end]" |
| [is_end](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L1664) | "gtk_text_iter_is_end() is the most efficient" | "[method@Gtk.TextIter.is_end] is the most efficient" |
| [set_line_index](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L3900) | "Same as gtk_text_iter_set_line_offset()" | "Same as [method@Gtk.TextIter.set_line_offset]" |
| [set_visible_line_index](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L3987) | "Like gtk_text_iter_set_line_index()" | "Like [method@Gtk.TextIter.set_line_index]" |
| [set_visible_line_offset](https://gitlab.gnome.org/GNOME/gtk/-/blob/main/gtk/gtktextiter.c#L3946) | "Like gtk_text_iter_set_line_offset()" | "Like [method@Gtk.TextIter.set_line_offset]" |