[mdspan.sub.map.sliceable] Add \tcode for SMR, submdspan_mapping_result<SM>, and SM (#8752)

Author: Andreas-Krug

source/containers.tex

@@ -26034,7 +26034,7 @@
 \begin{itemdescr}
 \pnum
 \result
-A type SMR that is a specialization of type submdspan_mapping_result<SM> for some type SM such that
+A type \tcode{SMR} that is a specialization of type \tcode{submdspan_mapping_result<SM>} for some type \tcode{SM} such that
 \begin{itemize}
 \item \tcode{SM} meets the layout mapping requirements\iref{mdspan.layout.policy.reqmts},
 \item \tcode{SM::extents_type} is a specialization of \tcode{extents},