update comments

Author: a-tarasyuk

clang/docs/ReleaseNotes.rst

@@ -718,7 +718,7 @@ Bug Fixes to C++ Support
   missing placeholder return type. (#GH78694)
 - Fixed a bug where bounds of partially expanded pack indexing expressions were checked too early. (#GH116105)
 - Fixed an assertion failure caused by invalid default argument substitutions in non-defining
-  friend declarations. (#GH113324).
+  friend declarations. (#GH113324)
 
 Bug Fixes to AST Handling
 ^^^^^^^^^^^^^^^^^^^^^^^^^

clang/lib/Sema/SemaTemplateInstantiateDecl.cpp

@@ -4695,8 +4695,8 @@ bool Sema::InstantiateDefaultArgument(SourceLocation CallLoc, FunctionDecl *FD,
   // FIXME: We don't track member specialization info for non-defining
   // friend declarations, so we will not be able to later find the function
   // pattern. As a workaround, don't instantiate the default argument in this
-  // case. This is correct per wording and only an error recovery issue, as per
-  // [dcl.fct.default]p4:
+  // case. This is correct per the standard and only an issue for recovery
+  // purposes. [dcl.fct.default]p4:
   //   if a friend declaration D specifies a default argument expression,
   //   that declaration shall be a definition.
   if (FD->getFriendObjectKind() != Decl::FOK_None &&