subcategory ---> category

Thanks to Keenan Kidwell
http://stacks.math.columbia.edu/tag/05RQ#comment-1706

derived.tex

@@ -3173,7 +3173,7 @@ \section{Distinguished triangles in the homotopy category}
 
 \begin{lemma}
 \label{lemma-bounded-triangulated-subcategories}
-Let $\mathcal{A}$ be an additive subcategory. The categories
+Let $\mathcal{A}$ be an additive category. The categories
 $K^{+}(\mathcal{A})$, $K^{-}(\mathcal{A})$, and $K^b(\mathcal{A})$
 are full triangulated subcategories of $K(\mathcal{A})$.
 \end{lemma}