Convert IBAction to objc

Author: dteoh

devdocs-macos/DocumentationViewController.swift

@@ -97,7 +97,7 @@ class DocumentationViewController: NSViewController {
 
     // MARK:- Page search
 
-    @IBAction func searchPageContents(_ sender: NSSearchField) {
+    @objc func searchPageContents(_ sender: NSSearchField) {
         let argsBytes = try! JSONSerialization.data(withJSONObject: ["term": sender.stringValue])
         let args = NSString(data: argsBytes, encoding: String.Encoding.utf8.rawValue)! as String
         webView.evaluateJavaScript("search( (\(args))[\"term\"] );")