Update source/containers.tex

Co-authored-by: Johel Ernesto Guerrero Peña <[email protected]>

Author: jensmaurer

source/containers.tex

@@ -17276,10 +17276,7 @@
 
 \pnum
 \effects
-Equivalent to:
-\begin{codeblock}
-c = std::move(cont);
-\end{codeblock}
+Equivalent to: \tcode{c = std::move(cont);}
 \end{itemdescr}
 
 \rSec3[flat.multiset.erasure]{Erasure}