docs: formatting fixes

docs/base-logic.tex

@@ -60,11 +60,11 @@ Below, $\melt$ ranges over $\monoid$ and $i$ ranges over $\set{1,2}$.
     \MU \var:\type. \term  \mid
     \Exists \var:\type. \prop \mid
     \All \var:\type. \prop \mid
-\\&
+%\\&
     \ownM{\term} \mid \mval(\term) \mid
     \always\prop \mid
     {\later\prop} \mid
-    \upd \prop\mid
+    \upd \prop
 \end{align*}
 Recursive predicates must be \emph{guarded}: in $\MU \var. \term$, the variable $\var$ can only appear under the later $\later$ modality.