Add link to where in the Unicode spec VS15 behavior comes from

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Kovid Goyal 2026-03-30 09:21:31 +05:30
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@ -461,8 +461,9 @@ Unicode variation selectors
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
There are two code points (:code:`U+FE0E` and :code:`U+FE0F`) that can actually
alter the width of the previous code point. When adding a code point to the
previous cell these have to be handled specially.
`alter the width of the previous code point <http://www.unicode.org/reports/tr11/#ED4>`__
by changing their presentation between *Emoji_Presentation* and *Text_Presentation*.
When adding a code point to the previous cell these have to be handled specially.
``U+FE0E`` - Variation Selector 15
When the previous cell has width two and the last code point in the previous