style: make CI happy

Signed-off-by: Jack Cherng <[email protected]>

Author: jfcherng

example/demo_web.php

@@ -57,7 +57,7 @@
             $newString,
             'Inline',
             $diffOptions,
-            ['detailLevel' => 'line'] + $rendererOptions
+            ['detailLevel' => 'line'] + $rendererOptions,
         );
 
         echo $inlineResult;

src/Renderer/Html/AbstractHtml.php

@@ -333,7 +333,7 @@ protected function htmlFixSpaces(string $string): string
      */
     protected function htmlReplaceSpacesToHtmlTag(string $string): string
     {
-        return strtr($string, [
+        return \strtr($string, [
             ' ' => '<span class="ch sp"> </span>',
             "\t" => "<span class=\"ch tab\">\t</span>",
         ]);