Ruby

ZJIT: remove unused rb_RSTRUCT_LEN()

ZJIT: remove unused rb_RSTRUCT_SET()

Re-fix VCS::GIT#branch_beginning

Count the last release date from the whole working directory, not
only the version headers.

[DOC] Improve docs for ObjectSpace.count_symbols

[DOC] Improve docs for ObjectSpace.count_imemo_objects

[DOC] Improve docs for ObjectSpace.count_tdata_objects

[ruby/prism] Bug #21831 Fix denominator of rational float literal

Denominators can contain underscores in fraction part as well as other
numeric literals.

https://github.com/ruby/prism/commit/e247cb58c7

pack.c: remove wasted allocation in BER integer packing

The 'w' format (BER compressed integer) was allocating an empty
string with rb_str_new(0, 0) then immediately overwriting it with
the correctly-sized allocation. Remove the wasted first allocation.
...

Remove RUBY_API_VERSION check in cxxanyargs.hpp

The version check used undefined macros, causing -Wundef warnings.
The conditional is no longer needed as Ruby is past version 3.1.

Disambiguate private and public RSTRUCT_ helpers

RSTRUCT_LEN / RSTRUCT_GET / RSTRUCT_SET all existing in two
versions, one public that does type and frozens checks
and one private that doesn't.

The problem is that this is error prone because the public version...