Mostly around newlines and line continuation.
* percent arrays need special backslash handling in the ast
* Fix offset issue for heredocs with many line continuations (used wrong variable as index access)
* More refined rules on when to simplify string tokens
* Handle line continuations in squiggly heredocs
* Correctly dedent squiggly heredocs with interpolation
* Consider `':foo:` and `%s[foo]` to not be interpolation
4edfe9d981
Slightly tweaking the import script becaues of backtrace format changes in Ruby 3.4
Most tests pass in all parsers, with only a handful of failures overall
9b5b785aa4