fix(jest-matcher-utils): show byte order mark character in diff

[lpizzinidev]

Summary

The byte order mark character is now shown in diff as a no-break space character to simplify debugging.

For example:

it("highlight byte order mark", () => {
  expect("\uFEFFTest content").toBe("Test content");
});

Will show:

Closes #10584

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This PR was closed because it has been stalled for 30 days with no activity. Please open a new PR if the issue is still relevant, linking to this one.

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