fix: format issues in examples (#176)

* dev: update formatting

* fix: code

* wrap syntax

packages/mitex/examples/example.typ

@@ -8,16 +8,16 @@ Write inline equations like #mi("x") or #mi[y].
 
 Also block equations (this case is from #text(blue.lighten(20%), link("https://katex.org/")[katex.org])):
 
-#mitex(`
+#mitex(```latex
   \newcommand{\f}[2]{#1f(#2)}
   \f\relax{x} = \int_{-\infty}^\infty
     \f\hat\xi\,e^{2 \pi i \xi x}
     \,d\xi
-`)
+```)
 
 We also support text mode (in development):
 
-#mitext(`
+#mitext(```latex
   \iftypst
     #set math.equation(numbering: "(1)", supplement: "Equation")
   \fi
@@ -45,4 +45,4 @@ We also support text mode (in development):
       \caption{This is an example table.}
       \label{tab:example}
   \end{table}
-`)
+```)