Merge 2019-07 LWG Motion 20

P1651R0 bind_front should not unwrap reference_wrapper

Fixes #3024.

Author: zygoloid

source/support.tex

@@ -553,7 +553,7 @@
   \tcode{<barrier>} \\ \rowsep
 \defnlibxname{cpp_lib_bit_cast}                             & \tcode{201806L} &
   \tcode{<bit>} \\ \rowsep
-\defnlibxname{cpp_lib_bind_front}                           & \tcode{201811L} &
+\defnlibxname{cpp_lib_bind_front}                           & \tcode{201907L} &
   \tcode{<functional>} \\ \rowsep
 \defnlibxname{cpp_lib_bitops}                               & \tcode{201907L} &
   \tcode{<bit>} \\ \rowsep

source/utilities.tex

@@ -15180,7 +15180,7 @@
   of type \tcode{FD},
   direct-non-list-initialized with \tcode{std::forward<F\brk{}>(f)},
 \item \tcode{BoundArgs} is a pack
-  that denotes \tcode{std::unwrap_ref_decay_t<Args>...},
+  that denotes \tcode{decay_t<Args>...},
 \item \tcode{bound_args} is
   a pack of bound argument entities of \tcode{g}\iref{func.def}
   of types \tcode{BoundArgs...},