Tweak code block styling

main.tex

@@ -289,24 +289,24 @@ In the case $\beta = \beta_{-}$ (or $\beta_{+}$) this can be simplified.
 \definecolor{codegreen}{rgb}{0,0.6,0}
 \definecolor{codegray}{rgb}{0.5,0.5,0.5}
 \definecolor{codepurple}{rgb}{0.58,0,0.82}
-\definecolor{backcolour}{rgb}{0.95,0.95,0.92}
+%\definecolor{backcolour}{rgb}{0.95,0.95,0.92}
 
 \lstdefinestyle{mystyle}{
-  backgroundcolor=\color{backcolour},   
+  %backgroundcolor=\color{backcolour},
   commentstyle=\color{codegreen},
   keywordstyle=\color{magenta},
   numberstyle=\tiny\color{codegray},
   stringstyle=\color{codepurple},
   basicstyle=\ttfamily\footnotesize,
-  breakatwhitespace=false,         
-  breaklines=true,                 
-  captionpos=b,                    
-  keepspaces=true,                 
-  numbers=left,                    
-  numbersep=5pt,                  
-  showspaces=false,                
+  breakatwhitespace=false,
+  breaklines=true,
+  captionpos=b,
+  keepspaces=true,
+  numbers=left,
+  numbersep=5pt,
+  showspaces=false,
   showstringspaces=false,
-  showtabs=false,                  
+  showtabs=false,
   tabsize=2
 }