Moves @iter forward by one character offset. Note that images
embedded in the buffer occupy 1 character slot, so
gtk_text_iter_forward_char() may actually move onto an image instead
of a character, if you have images in your buffer. If @iter is the
end iterator or one character before it, @iter will now point at
the end iterator, and gtk_text_iter_forward_char() returns %FALSE for
convenience when writing loops.
Moves @iter forward by one character offset. Note that images embedded in the buffer occupy 1 character slot, so gtk_text_iter_forward_char() may actually move onto an image instead of a character, if you have images in your buffer. If @iter is the end iterator or one character before it, @iter will now point at the end iterator, and gtk_text_iter_forward_char() returns %FALSE for convenience when writing loops.