+ keepspaces=true,
+ showstringspaces=false
+}
+
+% Define a style for interactive sage prompt listings.
+\lstdefinelanguage{sage}{ keywords={sage} }
+\lstdefinestyle{sage}{
+ commentstyle=\color{brown},
+ keywordstyle=\color{brilliantlavender},
+ stringstyle=\color{brilliantgreen}