commit 1aeb1819353418ebed635f18a009048700ba1ad0 (HEAD, refs/remotes/origin/master)
Author: Eli Zaretskii <eliz@gnu.org>
Date:   Wed Apr 8 12:52:18 2020 +0300

    ; * lisp/international/mule-conf.el: Minor comment wording fix.

diff --git a/lisp/international/mule-conf.el b/lisp/international/mule-conf.el
index e5ea491a37..edda79ba4e 100644
--- a/lisp/international/mule-conf.el
+++ b/lisp/international/mule-conf.el
@@ -1517,8 +1517,9 @@ for decoding and encoding files, process I/O, etc."
   :charset-list '(unicode)
   :pre-write-conversion 'utf-7-pre-write-conversion
   :post-read-conversion 'utf-7-post-read-conversion)
-;; FIXME: `define-coding-system' automatically sets :ascii-compatible-p,
-;; but UTF-7 is not ASCII compatible; disable (bug#40407).
+;; FIXME: 'define-coding-system' automatically sets :ascii-compatible-p,
+;; to any encoding whose :coding-type is 'utf-8', but UTF-7 is not ASCII
+;; compatible, so we override that here (bug#40407).
 (coding-system-put 'utf-7 :ascii-compatible-p nil)
 
 (define-coding-system 'utf-7-imap

commit 4e109d1529624d028a3312715e9c7b3cc8ebefb3
Author: Eli Zaretskii <eliz@gnu.org>
Date:   Wed Apr 8 12:50:57 2020 +0300

    Support character composition for Hangul jamo
    
    * lisp/language/korean.el: Add composition rules for conjoining
    Hangul jamo.  (Bug#40502)

diff --git a/lisp/language/korean.el b/lisp/language/korean.el
index 210d0fabaf..7e758159a4 100644
--- a/lisp/language/korean.el
+++ b/lisp/language/korean.el
@@ -84,6 +84,18 @@ and the following key bindings are available within Korean input methods:
   F9, Hangul_Hanja:	hangul-to-hanja-conversion")
 	    ))
 
+;; For auto-composing conjoining jamo.
+(let* ((choseong "[\u1100-\u115F\uA960-\uA97C]")
+       (jungseong "[\u1160-\u11A7\uD7B0-\uD7C6]")
+       (jongseong "[\u11A8-\u11FF\uD7CB-\uD7FB]?")
+       (pattern (concat choseong jungseong jongseong)))
+  (set-char-table-range composition-function-table
+                        '(#x1100 . #x115F)
+                        (list (vector pattern 0 'font-shape-gstring)))
+  (set-char-table-range composition-function-table
+                        '(#xA960 . #xA97C)
+                        (list (vector pattern 0 'font-shape-gstring))))
+
 (provide 'korean)
 
 ;;; korean.el ends here