Missing a

Thanks to Pieter Belmans
https://stacks.math.columbia.edu/tag/08WC#comment-5452

quot.tex

@@ -1447,7 +1447,7 @@ \section{The stack of coherent sheaves}
 
 \begin{theorem}[Algebraicity of the stack of coherent sheaves; flat case]
 \label{theorem-coherent-algebraic}
-Let $S$ be a scheme. Let $f : X \to B$ be morphism of algebraic spaces
+Let $S$ be a scheme. Let $f : X \to B$ be a morphism of algebraic spaces
 over $S$. Assume that $f$ is of finite presentation, separated, and
 flat\footnote{This assumption is not necessary. See
 Section \ref{section-not-flat}.}. Then $\Cohstack_{X/B}$ is