[stmt.expand] Add comma before "or" to list item

Author: tkoeppe

source/statements.tex

@@ -821,7 +821,7 @@
 \begin{itemize}
 \item
 \exposid{begin-expr} and \exposid{end-expr} are of the form
-\tcode{E.begin()} and \tcode{E.end()} or
+\tcode{E.begin()} and \tcode{E.end()}, or
 \item
 argument-dependent lookups for \tcode{begin(E)} and for \tcode{end(E)}
 each find at least one function or function template.