P0849R8 `auto(x)`: `decay-copy` In The Language (#2808)

stl/inc/yvals_core.h

@@ -189,6 +189,8 @@
 // P0769R2 shift_left(), shift_right()
 // P0784R7 Library Support For More constexpr Containers
 // P0811R3 midpoint(), lerp()
+// P0849R8 auto(x): decay-copy In The Language
+//     (library part only)
 // P0879R0 constexpr For Swapping Functions
 // P0887R1 type_identity
 // P0896R4 Ranges