skeleton_chars() has an incorrect(?) example.

[shelvacu]

['𝒶', '𝒷', '𝒸'].iter().map(|c| *c).collect::<String>();  "abc"

As this doesn't invoke skeleton_chars anywhere, I don't see how '𝒶' becomes 'a'. I assume it's supposed to be in there somewhere, but I'm new to rust so I'm not sure where.