SiteServiceImplTest: fix formatting.

Should be in 66a5ccd commit.

No functional changes.

Author: php-coder

src/test/groovy/ru/mystamps/web/service/SiteServiceImplTest.groovy

@@ -226,9 +226,9 @@ class SiteServiceImplTest extends Specification {
 				return true
 			})
 		where: userAgent | _
-		'  '             | _
-		''               | _
-		null             | _
+			'  '         | _
+			''           | _
+			null         | _
 	}
 
 	//