Fix widetilde placement

Thanks to Bejamin Diamond

constructions.tex

@@ -1784,7 +1784,7 @@ \section{Invertible sheaves on Proj}
 \text{and}
 \quad
 \widetilde{M} \otimes_{\mathcal{O}_X} \mathcal{O}_X(n) =
-\widetilde{M}(n) \cong \widetilde{M}(n)
+\widetilde{M}(n) \cong \widetilde{M(n)}
 $$
 Thus (\ref{equation-map-global-sections-degree-n}) becomes a map
 \begin{equation}