gtk_text_buffer_create_tag(buffer, "normal", NULL);
gtk_text_buffer_create_tag(buffer, "emphasized", "style", PANGO_STYLE_ITALIC, NULL);
gtk_text_buffer_create_tag(buffer, "preformatted", "font-desc", glk_data->monospace_font_desc, NULL);
gtk_text_buffer_create_tag(buffer, "normal", NULL);
gtk_text_buffer_create_tag(buffer, "emphasized", "style", PANGO_STYLE_ITALIC, NULL);
gtk_text_buffer_create_tag(buffer, "preformatted", "font-desc", glk_data->monospace_font_desc, NULL);