Improve documentation of "C-u C-x ="

* doc/emacs/mule.texi (International Chars): Mention the
composition information displayed by "C-u C-x =".  (Bug#42256)

1 files changed, 7 insertions, 1 deletions

diff --git a/doc/emacs/mule.texi b/doc/emacs/mule.texi
index 373c7b55817..0f07d286cda 100644
--- a/doc/emacs/mule.texi
+++ b/doc/emacs/mule.texi
@@ -192,7 +192,7 @@ What keys to type to input the character in the current input method
 
 @item
 The character's encodings, both internally in the buffer, and externally
-if you were to save the file.
+if you were to save the buffer to a file.
 
 @item
 If you are running Emacs on a graphical display, the font name and
@@ -200,6 +200,12 @@ glyph code for the character.  If you are running Emacs on a text
 terminal, the code(s) sent to the terminal.
 
 @item
+If the character was composed on display with any following characters
+to form one or more grapheme clusters, the composition information:
+the font glyphs if the frame is on a graphical display, else the
+characters that were composed.
+
+@item
 The character's text properties (@pxref{Text Properties,,,
 elisp, the Emacs Lisp Reference Manual}), including any non-default
 faces used to display the character, and any overlays containing it