small fix

inputs/lecture_13.tex

@@ -117,7 +117,7 @@ with $(f^{-1}(\{1\}), <)$.
     and $f$ is continuous.
 \end{proof}
 
-\subsection{$\Pi_1^1$-ranks}
+\subsection{\texorpdfstring{$\Pi_1^1$-ranks}{Coanalytic Ranks}}
 
 \gist{%
     Recall that a \vocab{rank} on a set $C$

logic3.tex

@@ -1,7 +1,7 @@
 \documentclass[10pt,a4paper,fancyfoot,git]{mkessler-script}
 
 \course{Logic 3: Abstract Topological Dynamics and Descriptive Set Theory%
-    \gist{}{\\ GIST}%
+    \gist{}{\texorpdfstring{\\ GIST}{}}%
 }
 \lecturer{Aleksandra Kwiatkowska}
 %\assistant{}