Support highlighting of accented characters
Support highlighting of accented characters

Summary: https://app.asana.com/0/110018685008094/176181783398318

Test Plan:
  # Make a local publish adding accented characters to a passage (At least 1 passage already contains accented characters but I couldn't find it...)
  # Test highlighting those characters in the passage.

Previous behavior:

{F560817}

New behavior:

{F560813}

Reviewers: mattdunnrankin

Reviewed By: mattdunnrankin

Subscribers: jared

Differential Revision: https://phabricator.khanacademy.org/D30566

learningequality/perseus,ariabuckles/perseus,learningequality/perseus,ariabuckles/perseus,ariabuckles/perseus,ariabuckles/perseus