This patch replaces the copyright symbol (©) with a curly apostrophe (’) on the keyboard.
I find this useful when searching for books by author, because names such as O'Brian (with a straight apostrophe) do not match O’Brian (with a curly apostrophe), so without a curly apostrophe key there is no reliable way to search for such names.
If anyone wants other keys replaced I should be able to work out a suitable patch.