Update Doc/library/codecs.rst

Co-authored-by: Stan Ulbrych <[email protected]>

Author: Prhmma

Doc/library/codecs.rst

@@ -1002,8 +1002,8 @@ then bytes have to be swapped though. To be able to detect the endianness of a
 This is the Unicode character ``U+FEFF``. This character can be prepended to every
 ``UTF-16`` or ``UTF-32`` byte sequence. The byte swapped version of this character
 (``0xFFFE``) is an illegal character that may not appear in a Unicode text.
-So when the first character in a ``UTF-16`` or ``UTF-32`` byte sequence appears to be
-a ``U+FFFE`` the bytes have to be swapped on decoding.
+When the first character of a ``UTF-16`` or ``UTF-32`` byte sequence is
+``U+FFFE``, the bytes have to be swapped on decoding.
 
 Unfortunately the character ``U+FEFF`` had a second purpose as
 a ``ZERO WIDTH NO-BREAK SPACE``: a character that has no width and doesn't allow