Eric McCarthy b59b77df30 Disallow underbars in \u{} escapes. ... Rust allows `\u{1_____0__F____F______FF__________________________}` to mean `\u{10FFFF}`, in both char and string literals. This PR, if accepted, would disallow this syntax in Leo char and string literals.		2021-06-06 20:10:06 -07:00
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rfc	Disallow underbars in \u{} escapes.	2021-06-06 20:10:06 -07:00