Also improve specs and documentation for finalizers and more clearly
recommend a safe code pattern to use them.

Fixes [Bug #17172].

* That is, for plain string literals, not interpolated.
* The test below is very similar and uses the same check.

This reverts commit 889bbbaf.

9b535f3f does not support ISeq#to_binary.
To make CI green, skip this test temporarily.

Please fix this issue and revert this patch.

* Revert "Revert "[ruby/securerandom] Use build_message instead of message for test-unit""
* [ruby/securerandom] Fixed the wrong usage of build_message

* Remove freezestring instruction since this was the only usage for it.
* [Feature #17104]

[Feature #17045] ObjectSpace.dump_all should allocate as little as possible in the GC heap

Up until this commit ObjectSpace.dump_all allocates two Hash because of `rb_scan_args`.

It also can allocate a `File` because of `rb_io_get_write_io`.

These allocations are problematic because `dump_all` dumps the Ruby
heap, so it should try modify as little as possible what it is
observing.

This reverts commit 7f9f5f57.

https://github.com/ruby/uri/commit/61c6a47ebf

https://github.com/ruby/securerandom/commit/826b877e83

By calling the instruction to `list.map` within `list.each` itself.
https://github.com/ruby/fileutils/commit/e690eec937

Found because `json` has a bad example in its test suite.
This implementation still offers better encapsulation.

This reverts commit 28e60b00.

This reverts commit e026e186..12a2e32d.

[Fixes https://bugs.ruby-lang.org/issues/15409]

This reverts commits:
dc38e99813
22c082fcfd
b499e0f9ff
58e5876646

Add test for overriden private methods

[Fixes https://bugs.ruby-lang.org/issues/12136]