[mdspan.sub.map.rightpad] Add $p$ for value p (#8755)

Author: Andreas-Krug

source/containers.tex

@@ -26449,7 +26449,7 @@
 \end{codeblock}
 if for a value $u$
 for which \tcode{\exposid{rank_} - $u$ - 2}
-is the largest value p smaller than \tcode{\exposid{rank_} - 1}
+is the largest value $p$ smaller than \tcode{\exposid{rank_} - 1}
 for which \tcode{SliceSpecifiers...[$p$]} is a unit-stride slice type,
 the following conditions are met:
 \begin{itemize}