fix(div): update class name to remove weird space afterwards (#763)

Signed-off-by: Aaron <29749331+aarnphm@users.noreply.github.com>

quartz/components/Graph.tsx

@@ -2,6 +2,7 @@ import { QuartzComponentConstructor, QuartzComponentProps } from "./types"
 // @ts-ignore
 import script from "./scripts/graph.inline"
 import style from "./styles/graph.scss"
+import { classNames } from "../util/lang"
 
 export interface D3Config {
   drag: boolean
@@ -56,7 +57,7 @@ export default ((opts?: GraphOptions) => {
     const localGraph = { ...defaultOptions.localGraph, ...opts?.localGraph }
     const globalGraph = { ...defaultOptions.globalGraph, ...opts?.globalGraph }
     return (
-      <div class={`graph ${displayClass ?? ""}`}>
+      <div class={classNames(displayClass, "graph")}>
         <h3>Graph View</h3>
         <div class="graph-outer">
           <div id="graph-container" data-cfg={JSON.stringify(localGraph)}></div>