MDL-82571 customfield_number: small coding style cleanup.

customfield/field/number/classes/field_controller.php

@@ -143,7 +143,7 @@ class field_controller  extends \core_customfield\field_controller {
      * @return string|null
      */
     public function prepare_field_for_display(mixed $value, ?context $context = null): ?string {
-        if ((float)$value == 0) {
+        if ((float) $value == 0) {
             $value = $this->get_configdata_property('displaywhenzero');
             if ((string) $value === '') {
                 return null;

customfield/field/number/tests/data_controller_test.php

@@ -132,17 +132,17 @@ final class data_controller_test extends advanced_testcase {
             'Export float value' => [42, 42.0, [
                 'decimalplaces' => 2,
                 'display' => '{value}',
-                'displaywhenzero' => 0],
-            ],
+                'displaywhenzero' => 0,
+            ]],
             'Export value with a prefix' => [10, '$ 10.00', [
                 'decimalplaces' => 2,
                 'display' => $template,
-                'displaywhenzero' => 0],
-            ],
+                'displaywhenzero' => 0,
+            ]],
             'Export value when zero' => [0, 'Unknown', [
                 'display' => '{value}',
-                'displaywhenzero' => $whenzero],
-            ],
+                'displaywhenzero' => $whenzero,
+            ]],
         ];
     }