LWG3773 views::zip_transform still requires F to be copy_constructible when empty pack

Author: burblebee

source/ranges.tex

@@ -9995,7 +9995,7 @@
 let \tcode{FD} be \tcode{decay_t<decltype((F))>}.
 \begin{itemize}
 \item
-If \tcode{\libconcept{copy_constructible}<FD> \&\&
+If \tcode{\libconcept{move_constructible}<FD> \&\&
 \libconcept{regular_invocable}<FD\&>} is \tcode{false}, or
 if \tcode{decay_t<invoke_result_t<FD\&>>} is not an object type,
 \tcode{views::zip_transform(F, Es...)} is ill-formed.