fix: Fix diff code errors.

Author: jaywcjlove

Example/Shared/DemoList.swift

@@ -8,6 +8,7 @@
 import SwiftUI
 
 struct DemoList: View {
+    @Environment(\.openURL) var openURL
     @State private var selection: String? = "Home"
     var body: some View {
         NavigationView {
@@ -22,6 +23,14 @@ struct DemoList: View {
             Text("\(selection ?? "Company Inc")")
             Spacer()
             #if os(macOS)
+            Button(action: {
+                openURL(URL(string: "https://jaywcjlove.github.io/markdown")!)
+            }, label: {
+                Image(systemName: "network")
+                    .resizable() // 它将调整大小，以便填充所有可用空间
+                    .aspectRatio(contentMode: .fit)
+                    .font(.system(size: 18))
+            })
             Button(action: {
                 NSApp.keyWindow?.firstResponder?.tryToPerform(#selector(NSSplitViewController.toggleSidebar(_:)), with: nil)
             }, label: {

Example/Shared/Group/CodeGroup.swift

@@ -31,6 +31,14 @@ struct CodeGroup: View {
         }
         ```
         
+        ```diff
+        @@ -4,6 +4,5 @@
+        -    let foo = bar.baz([1, 2, 3]);
+        -    foo = foo + 1;
+        +    const foo = bar.baz([1, 2, 3]) + 1;
+             console.log(`foo: ${foo}`);
+        ```
+        
         ```jsx
         import CodeMirror from '@uiw/react-codemirror';
         import { javascript } from '@codemirror/lang-javascript';

Sources/Markdown/MarkdownWebView.swift

@@ -89,7 +89,8 @@ public class MarkdownWebView: CustomView, WKNavigationDelegate {
         let content = """
         \(value)
         """.replacingOccurrences(of: "`", with: "\\`", options: .literal, range: nil)
-        let end = "`; markdownPreview(content.replace(/\\\\`/g, '`'));"
+            .replacingOccurrences(of: "{", with: "\\{", options: .literal, range: nil)
+        let end = "`; markdownPreview(content.replace(/\\\\`/g, '`').replace(/\\\\{/g, '{'));"
 
         let script = first + content + end
         callJavascript(javascriptString: script)