fixes

thesis/sections/background.tex

@@ -209,6 +209,8 @@ including simpler feedforward networks and more recent attention-based models,
 to evaluate trade-offs in performance, interpretability, and computational cost.
 
 The next section introduce the \emph{Transformer} architecture, a more recent alternative that forgoes
-recurrence in favor of attention mechanisms
+recurrence in favor of attention mechanisms.
 
 \subsubsection{Transformer Models}\label{subsubsec:transformer_models}
+
+