Update the list of :next specs

Author: eregon

doc/contributor/updating-ruby.md

@@ -149,6 +149,7 @@ In a separate commit, update all of these:
 * Run `jt test gems default-bundled-gems`
 * Grep for the old version with `git grep -F x.y.z`
 * If `tool/id.def` or `lib/cext/include/truffleruby/internal/id.h` has changed, `jt build core-symbols` and check for correctness.
+* Update the list of `:next` specs and change the "next version" in `spec/truffleruby.mspec`.
 
 ## Last step
 

spec/truffleruby.mspec

@@ -89,10 +89,7 @@ class MSpecScript
   ]
 
   set :next, %w[
-    spec/ruby/core/file/absolute_path_spec.rb
-    spec/ruby/core/matchdata/allocate_spec.rb
-    spec/ruby/core/unboundmethod/bind_call_spec.rb
-    spec/ruby/core/builtin_constants/builtin_constants_spec.rb
+    spec/ruby/core/mutex/owned_spec.rb
   ]
 
   set :tags_patterns, [
@@ -135,9 +132,11 @@ end
 
 if MSpecScript.child_process?
   if version = ENV["PRETEND_RUBY_VERSION"]
+    ::VersionGuard.send :remove_const, :FULL_RUBY_VERSION
     ::VersionGuard::FULL_RUBY_VERSION = SpecVersion.new(version)
   elsif ARGV.include? ":next"
-    ::VersionGuard::FULL_RUBY_VERSION = SpecVersion.new("2.7.0")
+    ::VersionGuard.send :remove_const, :FULL_RUBY_VERSION
+    ::VersionGuard::FULL_RUBY_VERSION = SpecVersion.new("3.0.0")
   end
 end