#117, Update KaTeX shortcode, add displayMode param

exampleSite/content/docs/shortcodes/katex.md

@@ -2,11 +2,11 @@
 
 KaTeX shortcode let you render math typesetting in markdown document. See [KaTeX](https://katex.org/)
 
-## Example 
+## Example
 {{< columns >}}
 
 ```latex
-{{</* katex [class="text-center"] */>}}
+{{</* katex [display] [class="text-center"]  */>}}
 x = \begin{cases}
    a &\text{if } b \\
    c &\text{if } d
@@ -25,3 +25,13 @@ x = \begin{cases}
 
 {{< /columns >}}
 
+## Display Mode Example
+
+Here is some inline example: {{< katex >}}\pi(x){{< /katex >}}, rendered in the same line. And below is `display` example, having `display: block`
+{{< katex display >}}
+x = \begin{cases}
+   a &\text{if } b \\
+   c &\text{if } d
+\end{cases}
+{{< /katex >}}
+Text continues here.