[libc++] Fix char_traits deprecation message (LLVM 18 -> 19) (#72690)

ldionne · web-flow · commit a1ae7e97de24 · 2023-11-17T14:32:11.000-05:00
We intend to remove the base specialization in LLVM 19, not LLVM 18. We
simply forgot to update the deprecation message accordingly.
diff --git a/libcxx/include/__string/char_traits.h b/libcxx/include/__string/char_traits.h
@@ -77,7 +77,7 @@ exposition-only to document what members a char_traits specialization should pro
 //
 #if !defined(_LIBCPP_CHAR_TRAITS_REMOVE_BASE_SPECIALIZATION)
 template <class _CharT>
-struct _LIBCPP_DEPRECATED_("char_traits<T> for T not equal to char, wchar_t, char8_t, char16_t or char32_t is non-standard and is provided for a temporary period. It will be removed in LLVM 18, so please migrate off of it.")
+struct _LIBCPP_DEPRECATED_("char_traits<T> for T not equal to char, wchar_t, char8_t, char16_t or char32_t is non-standard and is provided for a temporary period. It will be removed in LLVM 19, so please migrate off of it.")
     char_traits
 {
     using char_type  = _CharT;

Original file line number	Diff line number	Diff line change
`@@ -77,7 +77,7 @@ exposition-only to document what members a char_traits specialization should pro`
`77`	`77`	`//`
`78`	`78`	`#if !defined(_LIBCPP_CHAR_TRAITS_REMOVE_BASE_SPECIALIZATION)`
`79`	`79`	`template <class _CharT>`
`80`		`-struct _LIBCPP_DEPRECATED_("char_traits<T> for T not equal to char, wchar_t, char8_t, char16_t or char32_t is non-standard and is provided for a temporary period. It will be removed in LLVM 18, so please migrate off of it.")`
	`80`	`+struct _LIBCPP_DEPRECATED_("char_traits<T> for T not equal to char, wchar_t, char8_t, char16_t or char32_t is non-standard and is provided for a temporary period. It will be removed in LLVM 19, so please migrate off of it.")`
`81`	`81`	`char_traits`
`82`	`82`	`{`
`83`	`83`	`using char_type = _CharT;`