doc: fix typo

doc/bvar-a-la-sims.tex

@@ -33,7 +33,7 @@
 
 \begin{abstract}
   Dynare incorporates routines for Bayesian VAR models estimation, using a
-  flavor of the so-called ``Minnesota priors,''. These routines can be used
+  flavor of the so-called ``Minnesota priors.'' These routines can be used
   alone or in parallel with a DSGE estimation. This document describes their
   implementation and usage.
 \end{abstract}