[conv.qual] Fix punctuation in bulleted list.

Author: jensmaurer

source/expressions.tex

@@ -754,7 +754,7 @@
 \item
 if the resulting $\cv{}^3_i$ is different from $\cv{}^1_i$ or $\cv{}^2_i$,
 or the resulting $P^3_i$ is different from $P^1_i$ or $P^2_i$,
-then \tcode{const} is added to every $\cv{}^3_k$ for $0 < k < i$.
+then \tcode{const} is added to every $\cv{}^3_k$ for $0 < k < i$;
 \end{itemize}
 where $\cv{}^j_i$ and $P^j_i$ are the components of
 the cv-decomposition of $\tcode{T}j$.