Tweak pretty printing of LaTeX

Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>

src/Bergamot/Latex.elm

@@ -24,7 +24,7 @@ termToLatex f t =
         Call s ts -> "\\text{" ++ s ++ "}(" ++ String.join "," (List.map (termToLatex f) ts) ++ ")"
         Var x -> f x
         IntLit i -> String.fromInt i
-        StringLit s -> "\\text{" ++ "``" ++ s ++ "''" ++ "}"
+        StringLit s -> "\\texttt{" ++ "\"" ++ s ++ "\"" ++ "}"
 
 metavariableToLatex : Metavariable -> String
 metavariableToLatex (MkMetavariable s) =