Fix use of wrong lemma + attempt to help XyJax

THanks to Shanbei
https://stacks.math.columbia.edu/tag/0EYU#comment-3593
https://stacks.math.columbia.edu/tag/0EYU#comment-3595
(second one was already fixed)

etale-cohomology.tex

@@ -15177,13 +15177,13 @@ \section{Smooth base change}
 f^{-1}R^qg_*\mathcal{F} \ar[d] \ar[r] &
 f^{-1}R^qa_*\mathcal{F}|_W \ar[d] \oplus
 f^{-1}R^qb_*\mathcal{F}|_{W'} \ar[d]_{\cong} \ar[r] &
-\ldots \\
+... \\
 \ldots \ar[r] &
 R^qk_*e^{-1}\mathcal{F}|_{e^{-1}(W \cap W')} \ar[r] &
 R^qh_*e^{-1}\mathcal{F} \ar[r] &
 R^qi_*e^{-1}\mathcal{F}|_{e^{-1}(W)} \oplus
 R^qj_*e^{-1}\mathcal{F}|_{e^{-1}(W')} \ar[r] &
-\ldots
+...
 }
 $$
 whose rows are exact sequences by Lemma \ref{lemma-relative-mayer-vietoris}.
@@ -15243,7 +15243,7 @@ \section{Smooth base change}
 We have $\mathcal{I} = \colim (T \to T_i)^{-1}\mathcal{I}_i$
 by Lemma \ref{lemma-linus-hamann}. Pulling back by $e$ we get
 $e^{-1}\mathcal{I} = \colim (Y \to Y_i)^{-1}e_i^{-1}\mathcal{I}_i$.
-By Lemma \ref{lemma-relative-colimit} applied to the system
+By Lemma \ref{lemma-relative-colimit-general} applied to the system
 of morphisms $Y_i \to X_i$ with limit $Y \to X$ we have
 $$
 R^qh_*e^{-1}\mathcal{I} =