merge revision(s) 3b567eb491e460e00a66fdea8054eeb083b5dafd: [Backport #19459]

	[Bug #19459] Remove unnecessary always-true checks (#7362)

	`length` is a required argument for `IO::Buffer#read` and
	`IO::Buffer#write` methods, and `argc` is already checked with
	`rb_check_arity`.  Also fix the call-seq of `IO::Buffer#read`.
	---
	 io_buffer.c | 24 +++++++-----------------
	 1 file changed, 7 insertions(+), 17 deletions(-)

1 files changed, 1 insertions, 1 deletions

diff --git a/version.h b/version.h
index f32fd8a223..75e081cf3c 100644
--- a/version.h
+++ b/version.h
@@ -11,7 +11,7 @@
 # define RUBY_VERSION_MINOR RUBY_API_VERSION_MINOR
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_DATE RUBY_RELEASE_YEAR_STR"-"RUBY_RELEASE_MONTH_STR"-"RUBY_RELEASE_DAY_STR
-#define RUBY_PATCHLEVEL 38
+#define RUBY_PATCHLEVEL 39
 
 #include "ruby/version.h"
 #include "ruby/internal/abi.h"