fix(markdown, front): no bug in rendering code

* Fixed bug with incorrect HTML structure rendered for code blocks in markdown

Fixes #92

frontend/src/components/common/Markdown.js

@@ -125,12 +125,9 @@ const ListItemRenderer = (props, classes) => (
 );
 
 const CodeRenderer = (props) => (
-  <Typography variant={"body2"} paragraph>
-    <pre >
-      <code>
-        {props.value}
-      </code>
-    </pre>
+  // className={classes.code} would be override by typography variant
+  <Typography variant={"body2"} component='code' style={{fontFamily: "monospace"}}>
+    {props.value}
   </Typography>
 );