The bases for the hint were being decoded as base 16, despite being displayed as base 36 (0-9, a-z). This fix makes it so typing 'search string .index' returns the unicode char at the expected index, based on what is displayed by the program.
It also slightly changes the behavior. Before, only the selected result would appear. For example, musical note `musical note .18` would only show a single result, since there was only a single result at index 18. Now, searching by index doesn't remove codepoints/results, it simply highlights the result at the correct index for you.
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