Improve raw strings

[fuchsnj]

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Use Cases

Today the backslash (\) behavior inside raw strings can be confusing / inconsistent. The docs claim that backslashes have "no special meaning", however a backslash currently causes the parser to always include the next character (including the backslash itself). That means a blackslash can be used to include a single quote inside of a raw string, but this comes with some odd edge cases:

1. A single quote can't be included in a raw string without a leading backslash
2. The last character of a raw string cannot be a backslash

It would be nice if these restrictions could be lifted and a backslash actually had no special meaning.

Proposal

One possible solution is to allow raw string literals similar to Rust, where you can create a custom delimiter out of multiple characters, which would allow anything to be used inside of the raw string literal.

Version

0.23.0