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-rw-r--r--pod/perlunicode.pod5
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diff --git a/pod/perlunicode.pod b/pod/perlunicode.pod
index ad3637f567..26e704a63e 100644
--- a/pod/perlunicode.pod
+++ b/pod/perlunicode.pod
@@ -737,6 +737,11 @@ The following table is from Unicode 3.2.
Note the A0..BF in U+0800..U+0FFF, the 80..9F in U+D000...U+D7FF,
the 90..BF in U+10000..U+3FFFF, and the 80...8F in U+100000..U+10FFFF.
+The "gaps" are caused by legal UTF-8 avoiding non-shortest encodings:
+it is technically possible to UTF-8-encode a single code point in different
+ways, but that is explicitly forbidden, and the shortest possible encoding
+should always be used (and that is what Perl does).
+
Or, another way to look at it, as bits:
Code Points 1st Byte 2nd Byte 3rd Byte 4th Byte