Missing punctuation

Thanks to Dario Weissmann
https://stacks.math.columbia.edu/tag/07P5#comment-3536

more-algebra.tex

@@ -10432,7 +10432,7 @@ \section{Field extensions, revisited}
 \begin{lemma}
 \label{lemma-power-series-ring-subfields}
 Let $k$ be a field of characteristic $p > 0$. Let $n, m \geq 0$.
-Let $K$ be the fraction field of $k[[x_1, \ldots, x_d]][y_1, \ldots, y_m]$
+Let $K$ be the fraction field of $k[[x_1, \ldots, x_d]][y_1, \ldots, y_m]$.
 As $k'$ ranges through all subfields $k^p \subset k' \subset k$
 with $[k : k'] < \infty$ the subfields
 $$