emacs-28 efb1cd7: ; * etc/charsets/README: Update the format documentation.

[Eli Zaretskii]

branch: emacs-28
commit efb1cd7fa9f1a71ad3bf34627fe678acfcb48b38
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    ; * etc/charsets/README: Update the format documentation.
---
 etc/charsets/README | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/etc/charsets/README b/etc/charsets/README
index 0045a0f..96cba7c 100644
--- a/etc/charsets/README
+++ b/etc/charsets/README
@@ -27,7 +27,9 @@ character code separated by a space.  Both code points and 
Unicode
 character codes are in hexadecimal preceded by "0x".  Comments may be
 used, starting with "#".  Code ranges may also be used, with
 (inclusive) start and end code points separated by "-" followed by the
-Unicode of the start of the range
+Unicode of the start of the range.
+Code points for which there's no mapping to Unicode should be skipped,
+i.e. their lines should be omitted.
 
 Examples:
 0xA0 0x00A0  # no-break space