simplify readme example

Author: theodorejb

README.md

@@ -104,17 +104,13 @@ $template = Handlebars::compile('{{#equals my_var false}}Equal to false{{else}}N
 $options = [
     'helpers' => [
         'equals' => function (mixed $a, mixed $b, HelperOptions $options) {
-            $jsEquals = function (mixed $a, mixed $b): bool {
-                if ($a === null || $b === null || is_string($a) && is_string($b)) {
-                    // In JS, null is not equal to blank string or false or zero,
-                    // and when both operands are strings no coercion is performed.
-                    return $a === $b;
-                }
-    
-                return $a == $b;
-            };
-    
-            return $jsEquals($a, $b) ? $options->fn() : $options->inverse();
+            // In JS, null is not equal to blank string or false or zero,
+            // and when both operands are strings no coercion is performed.
+            $equal = ($a === null || $b === null || is_string($a) && is_string($b))
+                ? $a === $b
+                : $a == $b;
+
+            return $equal ? $options->fn() : $options->inverse();
         },
     ],
 ];