## Summary

This PR fixes `kDO_LAMBDA` token incompatibility between Parser gem and `Prism::Translation::Parser` for lambda `do` block.

### Parser gem (Expected)

Returns `kDO_LAMBDA` token:

```console
$ bundle exec ruby -Ilib -rparser/ruby33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = "-> do end"; p Parser::Ruby33.new.tokenize(buf)[2]'
ruby 3.4.0dev (2024-09-01T11:00:13Z master https://github.com/ruby/prism/commit/eb144ef91e) [x86_64-darwin23]
[[:tLAMBDA, ["->", #<Parser::Source::Range example.rb 0...2>]], [:kDO_LAMBDA, ["do", #<Parser::Source::Range example.rb 3...5>]],
[:kEND, ["end", #<Parser::Source::Range example.rb 6...9>]]]
```

### `Prism::Translation::Parser` (Actual)

Previously, the parser returned `kDO` token when parsing the following:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = "-> do end"; p Prism::Translation::Parser33.new.tokenize(buf)[2]'
ruby 3.4.0dev (2024-09-01T11:00:13Z master https://github.com/ruby/prism/commit/eb144ef91e) [x86_64-darwin23]
[[:tLAMBDA, ["->", #<Parser::Source::Range example.rb 0...2>]], [:kDO, ["do", #<Parser::Source::Range example.rb 3...5>]],
[:kEND, ["end", #<Parser::Source::Range example.rb 6...9>]]]
```

After the update, the parser now returns `kDO_LAMBDA` token for the same input:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = "-> do end"; p Prism::Translation::Parser33.new.tokenize(buf)[2]'
ruby 3.4.0dev (2024-09-01T11:00:13Z master https://github.com/ruby/prism/commit/eb144ef91e) [x86_64-darwin23]
[[:tLAMBDA, ["->", #<Parser::Source::Range example.rb 0...2>]], [:kDO_LAMBDA, ["do", #<Parser::Source::Range example.rb 3...5>]],
[:kEND, ["end", #<Parser::Source::Range example.rb 6...9>]]]
```

## Additional Information

Unfortunately, this kind of edge case doesn't work as expected; `kDO` is returned instead of `kDO_LAMBDA`.
However, since `kDO` is already being returned in this case, there is no change in behavior.

### Parser gem

Returns `tLAMBDA` token:

```console
$ bundle exec ruby -Ilib -rparser/ruby33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = "-> (foo = -> (bar) {}) do end"; p Parser::Ruby33.new.tokenize(buf)[2]'
ruby 3.3.5 (2024-09-03 revision https://github.com/ruby/prism/commit/ef084cc8f4) [x86_64-darwin23]
[[:tLAMBDA, ["->", #<Parser::Source::Range example.rb 0...2>]], [:tLPAREN2, ["(", #<Parser::Source::Range example.rb 3...4>]],
[:tIDENTIFIER, ["foo", #<Parser::Source::Range example.rb 4...7>]], [:tEQL, ["=", #<Parser::Source::Range example.rb 8...9>]],
[:tLAMBDA, ["->", #<Parser::Source::Range example.rb 10...12>]], [:tLPAREN2, ["(", #<Parser::Source::Range example.rb 13...14>]],
[:tIDENTIFIER, ["bar", #<Parser::Source::Range example.rb 14...17>]], [:tRPAREN, [")", #<Parser::Source::Range example.rb 17...18>]],
[:tLAMBEG, ["{", #<Parser::Source::Range example.rb 19...20>]], [:tRCURLY, ["}", #<Parser::Source::Range example.rb 20...21>]],
[:tRPAREN, [")", #<Parser::Source::Range example.rb 21...22>]], [:kDO_LAMBDA, ["do", #<Parser::Source::Range example.rb 23...25>]],
[:kEND, ["end", #<Parser::Source::Range example.rb 26...29>]]]
```

### `Prism::Translation::Parser`

Returns `kDO` token:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = "-> (foo = -> (bar) {}) do end"; p Prism::Translation::Parser33.new.tokenize(buf)[2]'
ruby 3.3.5 (2024-09-03 revision https://github.com/ruby/prism/commit/ef084cc8f4) [x86_64-darwin23]
[[:tLAMBDA, ["->", #<Parser::Source::Range example.rb 0...2>]], [:tLPAREN2, ["(", #<Parser::Source::Range example.rb 3...4>]],
[:tIDENTIFIER, ["foo", #<Parser::Source::Range example.rb 4...7>]], [:tEQL, ["=", #<Parser::Source::Range example.rb 8...9>]],
[:tLAMBDA, ["->", #<Parser::Source::Range example.rb 10...12>]], [:tLPAREN2, ["(", #<Parser::Source::Range example.rb 13...14>]],
[:tIDENTIFIER, ["bar", #<Parser::Source::Range example.rb 14...17>]], [:tRPAREN, [")", #<Parser::Source::Range example.rb 17...18>]],
[:tLAMBEG, ["{", #<Parser::Source::Range example.rb 19...20>]], [:tRCURLY, ["}", #<Parser::Source::Range example.rb 20...21>]],
[:tRPAREN, [")", #<Parser::Source::Range example.rb 21...22>]], [:kDO, ["do", #<Parser::Source::Range example.rb 23...25>]],
[:kEND, ["end", #<Parser::Source::Range example.rb 26...29>]]]
```

As the intention is not to address such special cases at this point, a comment has been left indicating that this case still returns `kDO`.
In other words, `kDO_LAMBDA` will now be returned except for edge cases after this PR.

https://github.com/ruby/prism/commit/2ee480654c

This PR fixes a token incompatibility between Parser gem and `Prism::Translation::Parser` for double splat argument.

## Parser gem (Expected)

Returns `tDSTAR` token:

```console
$ bundle exec ruby -Ilib -rparser/ruby33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = "def f(**foo) end"; p Parser::Ruby33.new.tokenize(buf)[2]'
ruby 3.4.0dev (2024-09-01T11:00:13Z master https://github.com/ruby/prism/commit/eb144ef91e) [x86_64-darwin23]
[[:kDEF, ["def", #<Parser::Source::Range example.rb 0...3>]], [:tIDENTIFIER, ["f", #<Parser::Source::Range example.rb 4...5>]],
[:tLPAREN2, ["(", #<Parser::Source::Range example.rb 5...6>]], [:tDSTAR, ["**", #<Parser::Source::Range example.rb 6...8>]],
[:tIDENTIFIER, ["foo", #<Parser::Source::Range example.rb 8...11>]], [:tRPAREN, [")", #<Parser::Source::Range example.rb 11...12>]],
[:kEND, ["end", #<Parser::Source::Range example.rb 13...16>]]]
```

## `Prism::Translation::Parser` (Actual)

Previously, the parser returned `tPOW` token when parsing the following:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = "def f(**foo) end"; p Prism::Translation::Parser33.new.tokenize(buf)[2]'
ruby 3.4.0dev (2024-09-01T11:00:13Z master https://github.com/ruby/prism/commit/eb144ef91e) [x86_64-darwin23]
[[:kDEF, ["def", #<Parser::Source::Range example.rb 0...3>]], [:tIDENTIFIER, ["f", #<Parser::Source::Range example.rb 4...5>]],
[:tLPAREN2, ["(", #<Parser::Source::Range example.rb 5...6>]], [:tPOW, ["**", #<Parser::Source::Range example.rb 6...8>]],
[:tIDENTIFIER, ["foo", #<Parser::Source::Range example.rb 8...11>]], [:tRPAREN, [")", #<Parser::Source::Range example.rb 11...12>]],
[:kEND, ["end", #<Parser::Source::Range example.rb 13...16>]]]
```

After the update, the parser now returns `tDSTAR` token for the same input:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = "def f(**foo) end"; p Prism::Translation::Parser33.new.tokenize(buf)[2]'
ruby 3.4.0dev (2024-09-01T11:00:13Z master https://github.com/ruby/prism/commit/eb144ef91e) [x86_64-darwin23]
[[:kDEF, ["def", #<Parser::Source::Range example.rb 0...3>]], [:tIDENTIFIER, ["f", #<Parser::Source::Range example.rb 4...5>]],
[:tLPAREN2, ["(", #<Parser::Source::Range example.rb 5...6>]], [:tDSTAR, ["**", #<Parser::Source::Range example.rb 6...8>]],
[:tIDENTIFIER, ["foo", #<Parser::Source::Range example.rb 8...11>]], [:tRPAREN, [")", #<Parser::Source::Range example.rb 11...12>]],
[:kEND, ["end", #<Parser::Source::Range example.rb 13...16>]]]
```

With this change, the following code could be removed from test/prism/ruby/parser_test.rb:

```diff
-          when :tPOW
-            actual_token[0] = expected_token[0] if expected_token[0] == :tDSTAR
```

`tPOW` is the token type for the behavior of `a ** b`, and its behavior remains unchanged:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = "a ** b"; p Prism::Translation::Parser33.new.tokenize(buf)[2]'
ruby 3.4.0dev (2024-09-01T11:00:13Z master https://github.com/ruby/prism/commit/eb144ef91e) [x86_64-darwin23]
[[:tIDENTIFIER, ["a", #<Parser::Source::Range example.rb 0...1>]], [:tPOW, ["**", #<Parser::Source::Range example.rb 2...4>]],
[:tIDENTIFIER, ["b", #<Parser::Source::Range example.rb 5...6>]]]
```

https://github.com/ruby/prism/commit/66bde35a44

This PR fixes a token incompatibility between Parser gem and `Prism::Translation::Parser` for left parenthesis.

## Parser gem (Expected)

Returns `tLPAREN2` token:

```console
$ bundle exec ruby -Ilib -rparser/ruby33 \
-ve 'buf = Parser::Source::Buffer.new("example.rb"); buf.source = "foo(:bar)"; p Parser::Ruby33.new.tokenize(buf)[2]'
ruby 3.4.0dev (2024-09-01T11:00:13Z master https://github.com/ruby/prism/commit/eb144ef91e) [x86_64-darwin23]
[[:tIDENTIFIER, ["foo", #<Parser::Source::Range example.rb 0...3>]], [:tLPAREN2, ["(", #<Parser::Source::Range example.rb 3...4>]],
[:tSYMBOL, ["bar", #<Parser::Source::Range example.rb 4...8>]], [:tRPAREN, [")", #<Parser::Source::Range example.rb 8...9>]]]
```

## `Prism::Translation::Parser` (Actual)

Previously, the parser returned `tLPAREN` token when parsing the following:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = "foo(:bar)"; p Prism::Translation::Parser33.new.tokenize(buf)[2]'
ruby 3.4.0dev (2024-09-01T11:00:13Z master https://github.com/ruby/prism/commit/eb144ef91e) [x86_64-darwin23]
[[:tIDENTIFIER, ["foo", #<Parser::Source::Range example.rb 0...3>]], [:tLPAREN, ["(", #<Parser::Source::Range example.rb 3...4>]],
[:tSYMBOL, ["bar", #<Parser::Source::Range example.rb 4...8>]], [:tRPAREN, [")", #<Parser::Source::Range example.rb 8...9>]]]
```

After the update, the parser now returns `tLPAREN2` token for the same input:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = "foo(:bar)"; p Prism::Translation::Parser33.new.tokenize(buf)[2]'
ruby 3.4.0dev (2024-09-01T11:00:13Z master https://github.com/ruby/prism/commit/eb144ef91e) [x86_64-darwin23]
[[:tIDENTIFIER, ["foo", #<Parser::Source::Range example.rb 0...3>]], [:tLPAREN2, ["(", #<Parser::Source::Range example.rb 3...4>]],
[:tSYMBOL, ["bar", #<Parser::Source::Range example.rb 4...8>]], [:tRPAREN, [")", #<Parser::Source::Range example.rb 8...9>]]]
```

The `PARENTHESIS_LEFT` token in Prism is classified as either `tLPAREN` or `tLPAREN2` in the Parser gem.
The tokens that were previously all classified as `tLPAREN` are now also classified to `tLPAREN2`.

With this change, the following code could be removed from `test/prism/ruby/parser_test.rb`:

```diff
-          when :tLPAREN
-            actual_token[0] = expected_token[0] if expected_token[0] == :tLPAREN2
```

https://github.com/ruby/prism/commit/04d6f3478d

https://github.com/ruby/prism/commit/5985ab7687

This PR fixes token incompatibility for `Prism::Translation::Parser::Lexer` when using backquoted heredoc indetiner:

```ruby
<<-`  FOO`
a
b
     FOO
```

## Parser gem (Expected)

Returns `tXSTRING_BEG` as the first token:

```console
$ bundle exec ruby -Ilib -rparser/ruby33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = File.read("example.rb"); p Parser::Ruby33.new.tokenize(buf)'
ruby 3.3.0 (2023-12-25 revision https://github.com/ruby/prism/commit/5124f9ac75) [x86_64-darwin22]
[s(:xstr,
  s(:str, "a\n"),
  s(:str, "b\n")), [], [[:tXSTRING_BEG, ["<<`", #<Parser::Source::Range example.rb 0...10>]],
[:tSTRING_CONTENT, ["a\n", #<Parser::Source::Range example.rb 11...13>]],
[:tSTRING_CONTENT, ["b\n", #<Parser::Source::Range example.rb 13...15>]],
[:tSTRING_END, ["  FOO", #<Parser::Source::Range example.rb 15...23>]], [:tNL, [nil, #<Parser::Source::Range example.rb 10...11>]]]]
```

## `Prism::Translation::Parser` (Actual)

Previously, the tokens returned by the Parser gem were different. The escaped backslash does not match in the `tSTRING_BEG` token and
value of `tSTRING_END` token.

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = File.read("example.rb"); p Prism::Translation::Parser33.new.tokenize(buf)'
ruby 3.3.0 (2023-12-25 revision https://github.com/ruby/prism/commit/5124f9ac75) [x86_64-darwin22]
[s(:xstr,
  s(:str, "a\n"),
  s(:str, "b\n")), [], [[:tSTRING_BEG, ["<<\"", #<Parser::Source::Range example.rb 0...10>]],
[:tSTRING_CONTENT, ["a\n", #<Parser::Source::Range example.rb 11...13>]],
[:tSTRING_CONTENT, ["b\n", #<Parser::Source::Range example.rb 13...15>]],
[:tSTRING_END, ["`  FOO`", #<Parser::Source::Range example.rb 15...23>]], [:tNL, [nil, #<Parser::Source::Range example.rb 10...11>]]]]
```

After this correction, the AST and tokens returned by the Parser gem are the same:

```console
$ bunlde exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = File.read("example.rb"); p Prism::Translation::Parser33.new.tokenize(buf)'
ruby 3.3.0 (2023-12-25 revision https://github.com/ruby/prism/commit/5124f9ac75) [x86_64-darwin22]
[s(:xstr,
  s(:str, "a\n"),
  s(:str, "b\n")), [], [[:tXSTRING_BEG, ["<<`", #<Parser::Source::Range example.rb 0...10>]],
[:tSTRING_CONTENT, ["a\n", #<Parser::Source::Range example.rb 11...13>]],
[:tSTRING_CONTENT, ["b\n", #<Parser::Source::Range example.rb 13...15>]],
[:tSTRING_END, ["  FOO", #<Parser::Source::Range example.rb 15...23>]], [:tNL, [nil, #<Parser::Source::Range example.rb 10...11>]]]]
```

https://github.com/ruby/prism/commit/308f8d85a1

This PR fixes token incompatibility for `Prism::Translation::Parser::Lexer`
when using escaped backslash in string literal:

```ruby
"\\ foo \\ bar"
```

## Parser gem (Expected)

```console
$ bundle exec ruby -Ilib -rparser/ruby33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = File.read("example.rb"); p Parser::Ruby33.new.tokenize(buf)'
ruby 3.3.0 (2023-12-25 revision https://github.com/ruby/prism/commit/5124f9ac75) [x86_64-darwin22]
[s(:str, "\\ foo \\ bar"), [], [[:tSTRING, ["\\ foo \\ bar", #<Parser::Source::Range example.rb 0...15>]],
[:tNL, [nil, #<Parser::Source::Range example.rb 15...16>]]]]
```

## `Prism::Translation::Parser` (Actual)

Previously, the tokens returned by the Parser gem were different. The escaped backslash does not match in the `tSTRING` token:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = File.read("example.rb"); p Prism::Translation::Parser33.new.tokenize(buf)'
ruby 3.3.0 (2023-12-25 revision https://github.com/ruby/prism/commit/5124f9ac75) [x86_64-darwin22]
[s(:str, "\\ foo \\ bar"), [], [[:tSTRING, ["\\\\ foo \\\\ bar", #<Parser::Source::Range example.rb 0...15>]],
[:tNL, [nil, #<Parser::Source::Range example.rb 15...16>]]]]
```

After this correction, the AST and tokens returned by the Parser gem are the same:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = File.read("example.rb"); p Prism::Translation::Parser33.new.tokenize(buf)'
ruby 3.3.0 (2023-12-25 revision https://github.com/ruby/prism/commit/5124f9ac75) [x86_64-darwin22]
[s(:str, "\\ foo \\ bar"), [], [[:tSTRING, ["\\ foo \\ bar", #<Parser::Source::Range example.rb 0...15>]],
[:tNL, [nil, #<Parser::Source::Range example.rb 15...16>]]]]
```

The reproduction test is based on the following strings.txt and exists:
https://github.com/ruby/prism/blob/v0.24.0/test/prism/fixtures/strings.txt#L79

But, the restoration has not yet been performed due to remaining other issues in strings.txt.

https://github.com/ruby/prism/commit/2c44e7e307

This PR fixes a token incompatibility between Parser gem and `Prism::Translation::Parser`
for the heredocs_leading_whitespace.txt test.

https://github.com/ruby/prism/commit/7d45fb1eed

This PR fixes an AST and token incompatibility between Parser gem and `Prism::Translation::Parser`
for dstring literal:

```ruby
"foo
  #{bar}"
```

## Parser gem (Expected)

```console
$ bundle exec ruby -Ilib -rparser/ruby33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = File.read("example.rb"); p Parser::Ruby33.new.tokenize(buf)'
ruby 3.3.0 (2023-12-25 revision https://github.com/ruby/prism/commit/5124f9ac75) [x86_64-darwin22]
[s(:dstr,
  s(:str, "foo\n"),
  s(:str, "  "),
  s(:begin,
    s(:send, nil, :bar))), [], [[:tSTRING_BEG, ["\"", #<Parser::Source::Range example.rb 0...1>]],
[:tSTRING_CONTENT, ["foo\n", #<Parser::Source::Range example.rb 1...5>]],
[:tSTRING_CONTENT, ["  ", #<Parser::Source::Range example.rb 5...7>]],
[:tSTRING_DBEG, ["\#{", #<Parser::Source::Range example.rb 7...9>]],
[:tIDENTIFIER, ["bar", #<Parser::Source::Range example.rb 9...12>]],
[:tSTRING_DEND, ["}", #<Parser::Source::Range example.rb 12...13>]],
[:tSTRING_END, ["\"", #<Parser::Source::Range example.rb 13...14>]], [:tNL, [nil, #<Parser::Source::Range example.rb 14...15>]]]]
```

## `Prism::Translation::Parser` (Actual)

Previously, the AST and tokens returned by the Parser gem were different. In this case, `dstr` node should not be nested:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = File.read("example.rb"); p Prism::Translation::Parser33.new.tokenize(buf)'
ruby 3.3.0 (2023-12-25 revision https://github.com/ruby/prism/commit/5124f9ac75) [x86_64-darwin22]
[s(:dstr,
  s(:dstr,
    s(:str, "foo\n"),
    s(:str, "  ")),
  s(:begin,
    s(:send, nil, :bar))), [], [[:tSTRING_BEG, ["\"", #<Parser::Source::Range example.rb 0...1>]],
[:tSTRING_CONTENT, ["foo\n", #<Parser::Source::Range example.rb 1...5>]],
[:tSTRING_CONTENT, ["  ", #<Parser::Source::Range example.rb 5...7>]],
[:tSTRING_DBEG, ["\#{", #<Parser::Source::Range example.rb 7...9>]],
[:tIDENTIFIER, ["bar", #<Parser::Source::Range example.rb 9...12>]],
[:tSTRING_DEND, ["}", #<Parser::Source::Range example.rb 12...13>]],
[:tSTRING_END, ["\"", #<Parser::Source::Range example.rb 13...14>]], [:tNL, [nil, #<Parser::Source::Range example.rb 14...15>]]]]
```

After this correction, the AST and tokens returned by the Parser gem are the same:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("example.rb"); buf.source = File.read("example.rb"); p Prism::Translation::Parser33.new.tokenize(buf)'
ruby 3.3.0 (2023-12-25 revision https://github.com/ruby/prism/commit/5124f9ac75) [x86_64-darwin22]
[s(:dstr,
  s(:str, "foo\n"),
  s(:str, "  "),
  s(:begin,
    s(:send, nil, :bar))), [], [[:tSTRING_BEG, ["\"", #<Parser::Source::Range example.rb 0...1>]],
[:tSTRING_CONTENT, ["foo\n", #<Parser::Source::Range example.rb 1...5>]],
[:tSTRING_CONTENT, ["  ", #<Parser::Source::Range example.rb 5...7>]],
[:tSTRING_DBEG, ["\#{", #<Parser::Source::Range example.rb 7...9>]],
[:tIDENTIFIER, ["bar", #<Parser::Source::Range example.rb 9...12>]],
[:tSTRING_DEND, ["}", #<Parser::Source::Range example.rb 12...13>]],
[:tSTRING_END, ["\"", #<Parser::Source::Range example.rb 13...14>]], [:tNL, [nil, #<Parser::Source::Range example.rb 14...15>]]]]
```

https://github.com/ruby/prism/commit/c1652a9ee7

This PR fixes an AST and token incompatibility between Parser gem and `Prism::Translation::Parser`
for empty xstring literal.

## Parser gem (Expected)

```console
$ bundle exec ruby -Ilib -rparser/ruby33 -ve \
'buf = Parser::Source::Buffer.new("/tmp/s.rb"); buf.source = "``"; p Parser::Ruby33.new.tokenize(buf)'
ruby 3.3.0 (2023-12-25 revision https://github.com/ruby/prism/commit/5124f9ac75) [x86_64-darwin22]
[s(:xstr), [], [[:tXSTRING_BEG, ["`", #<Parser::Source::Range /tmp/s.rb 0...1>]],
[:tSTRING_END, ["`", #<Parser::Source::Range /tmp/s.rb 1...2>]]]]
```

## `Prism::Translation::Parser` (Actual)

Previously, the AST and tokens returned by the Parser gem were different:

```console
$ bunele exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("/tmp/s.rb"); buf.source = "``"; p Prism::Translation::Parser33.new.tokenize(buf)'
ruby 3.3.0 (2023-12-25 revision https://github.com/ruby/prism/commit/5124f9ac75) [x86_64-darwin22]
[s(:xstr, s(:str, "")), [], [[:tBACK_REF2, ["`", #<Parser::Source::Range /tmp/s.rb 0...1>]],
[:tSTRING_END, ["`", #<Parser::Source::Range /tmp/s.rb 1...2>]]]]
```

After this correction, the AST and tokens returned by the Parser gem are the same:

```console
$ bundle exec ruby -Ilib -rprism -rprism/translation/parser33 -ve \
'buf = Parser::Source::Buffer.new("/tmp/s.rb"); buf.source = "``"; p Prism::Translation::Parser33.new.tokenize(buf)'
ruby 3.3.0 (2023-12-25 revision https://github.com/ruby/prism/commit/5124f9ac75) [x86_64-darwin22]
[s(:xstr), [], [[:tXSTRING_BEG, ["`", #<Parser::Source::Range /tmp/s.rb 0...1>]],
[:tSTRING_END, ["`", #<Parser::Source::Range /tmp/s.rb 1...2>]]]]
```

https://github.com/ruby/prism/commit/4ac89dcbb5