[array.overview] Make a note of the complexity exceptions in the iref

Author: JohelEGP

source/containers.tex

@@ -3414,8 +3414,11 @@
 \indextext{requirements!container}%
 An \tcode{array} meets all of the requirements of a container and
 of a reversible container\iref{container.requirements}, except that a default
-constructed \tcode{array} object is not empty and that \tcode{swap} does not have constant
-complexity. An \tcode{array} meets some of the requirements of a sequence
+constructed \tcode{array} object is not empty.
+\begin{note}
+Move construction and \tcode{swap} do not have constant complexity.
+\end{note}
+An \tcode{array} meets some of the requirements of a sequence
 container\iref{sequence.reqmts}.
 Descriptions are provided here
 only for operations on \tcode{array} that are not described in