minor symfony#15252 [Form] Remove excess whitespace (aivus)

This PR was merged into the 2.3 branch.

Discussion
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[Form] Remove excess whitespace

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

Commits
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b1b52ad Remove excess whitespace

Author: fabpot

src/Symfony/Component/Form/Form.php

@@ -357,7 +357,7 @@ public function setData($modelData)
         if (!FormUtil::isEmpty($viewData)) {
             $dataClass = $this->config->getDataClass();
 
-            $actualType = is_object($viewData) ? 'an instance of class '.get_class($viewData) : ' a(n) '.gettype($viewData);
+            $actualType = is_object($viewData) ? 'an instance of class '.get_class($viewData) : 'a(n) '.gettype($viewData);
 
             if (null === $dataClass && is_object($viewData) && !$viewData instanceof \ArrayAccess) {
                 $expectedType = 'scalar, array or an instance of \ArrayAccess';