Revert mb_trim to trim for broader PHP support

Author: veewee

src/Documentation/StandardDocumentationReader.php

@@ -31,6 +31,6 @@ public function get(\DOMElement $node): string
         }
         $doc = preg_replace('/[\t ]+/', ' ', $doc);
 
-        return mb_trim($doc);
+        return trim($doc);
     }
 }

src/SchemaReader.php

@@ -110,7 +110,7 @@ private function extractErrorMessage(): \Exception
         $errors = [];
 
         foreach (libxml_get_errors() as $error) {
-            $errors[] = sprintf("Error[%s] code %s: %s in '%s' at position %s:%s", $error->level, $error->code, mb_trim($error->message), $error->file, $error->line, $error->column);
+            $errors[] = sprintf("Error[%s] code %s: %s in '%s' at position %s:%s", $error->level, $error->code, trim($error->message), $error->file, $error->line, $error->column);
         }
         $e = new \Exception(implode('; ', $errors));
         libxml_use_internal_errors(false);
@@ -1244,7 +1244,7 @@ private function loadImport(
 
     private function createOrUseSchemaForNs(Schema $schema, string $namespace): Schema
     {
-        if ('' !== mb_trim($namespace)) {
+        if ('' !== trim($namespace)) {
             $newSchema = new Schema();
             $newSchema->addSchema($this->getGlobalSchema());
             $schema->addSchema($newSchema);

src/Utils/UrlUtils.php

@@ -8,7 +8,7 @@ class UrlUtils
 {
     public static function resolveRelativeUrl(string $base, string $rel): string
     {
-        if ('' === mb_trim($rel)) {
+        if ('' === trim($rel)) {
             return $base;
         }
 

tests/ElementsTest.php

@@ -218,7 +218,7 @@ public function testDefaultSchemaQualificationInheritance(): void
         self::assertTrue($schema->getElementsQualification());
 
         /**
-         * @var $element ElementSingle
+         * @var ElementSingle $element
          */
         $element = $myType->getElements()[0];
         self::assertTrue($element->isQualified());