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[ruby/prism] Sync Prism::Translation::ParserCurrent with Ruby 4.0

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This PR updates the fallback version for `Prism::Translation::ParserCurrent` from 3.4 to 4.0.

Currently, the fallback resolves to `Parser34`, as shown below:

```console
$ ruby -v -rprism -rprism/translation/parser_current -e 'p Prism::Translation::ParserCurrent'
ruby 3.0.7p220 (2024-04-23 revision https://github.com/ruby/prism/commit/724a071175) [x86_64-darwin23]
warning: `Prism::Translation::Current` is loading Prism::Translation::Parser34, but you are running 3.0.
Prism::Translation::Parser34
```

Following the comment "Keep this in sync with released Ruby.",
it seems like the right time to set this to Ruby 4.0, which is scheduled for release this week.

https://github.com/ruby/prism/commit/115f0a118c
This commit is contained in:
Koichi ITO 2025-12-21 05:58:23 +09:00 committed by Hiroshi SHIBATA
parent 44a1765684
commit f3149af35a
Notes: git 2025-12-26 02:02:31 +00:00 
Merged: https://github.com/ruby/ruby/pull/15736
1 changed files with 1 additions and 1 deletions
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lib/prism/translation/parser_current.rb
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@ -16,7 +16,7 @@ module Prism
ParserCurrent = Parser41
else
# Keep this in sync with released Ruby.
parser = Parser34
parser = Parser40
major, minor, _patch = Gem::Version.new(RUBY_VERSION).segments
warn "warning: `Prism::Translation::Current` is loading #{parser.name}, " \
"but you are running #{major}.#{minor}."