[support.exception] Add reference to [depr.uncaught].

[ostream::sentry] Use uncaught_exceptions() instead of deprecated
uncaught_exception().

Author: jwakely

source/iostreams.tex

@@ -6044,8 +6044,8 @@
 \begin{itemdescr}
 \pnum
 If
-\tcode{((os.flags() \& ios_base::unitbuf) \&\& !uncaught_exception()
-\&\& os.good())}
+\tcode{(os.flags() \& ios_base::unitbuf) \&\& !uncaught_exceptions()
+\&\& os.good()}
 is
 \tcode{true},
 calls

source/support.tex

@@ -2587,8 +2587,9 @@
   terminate_handler set_terminate(terminate_handler f) noexcept;
   [[noreturn]] void terminate() noexcept;
 
-  bool uncaught_exception() noexcept;
   int uncaught_exceptions() noexcept;
+  // \ref{depr.uncaught}, uncaught_exception (deprecated)
+  bool uncaught_exception() noexcept;
 
   typedef @\unspec@ exception_ptr;