[Clang] Update release notes

Author: redcode

clang/docs/ReleaseNotes.rst

@@ -475,12 +475,12 @@ Non-comprehensive list of changes in this release
   ``__INTMAX_C``, ``__UINT8_C``, ``__UINT16_C``, ``__UINT32_C``, ``__UINT64_C``
   and ``__UINTMAX_C`` have been introduced to ease the implementaton of section
   7.18.4 of ISO/IEC 9899:1999. These macros are also defined by GCC and should
-  be used instead of others that need to expand and paste the suffixes provided
-  by ``__INT8_C_SUFFIX__``, ``__INT16_C_SUFFIX__``, ``__INT32_C_SUFFIX__``,
+  be used instead of others that expand and paste the suffixes provided by
+  ``__INT8_C_SUFFIX__``, ``__INT16_C_SUFFIX__``, ``__INT32_C_SUFFIX__``,
   ``__INT64_C_SUFFIX__``, ``__INTMAX_C_SUFFIX__``, ``__UINT8_C_SUFFIX__``,
   ``__UINT16_C_SUFFIX__``, ``__UINT32_C_SUFFIX__``, ``__UINT64_C_SUFFIX__`` and
-  ``__UINTMAX_C_SUFFIX__``. Pasting suffixes is unsafe, as users can define them
-  as macros.
+  ``__UINTMAX_C_SUFFIX__``. Pasting suffixes after the expansion of their
+  respective macros is unsafe, as users can define the suffixes as macros.
 
 - Clang now rejects ``_BitInt`` matrix element types if the bit width is less than ``CHAR_WIDTH`` or
   not a power of two, matching preexisting behaviour for vector types.