[BUGFIX] Fix arrows in xml files (#308)

Author: simonschaufi

e2e/typo3-xml/expected-output.txt

@@ -7,7 +7,7 @@
     ---------- begin diff ----------
 @@ @@
  					<settings.nullable_field_trimmed>
- 						<label>Nullable field trimmed</label>
+ 						<label>Nullable field -> trimmed</label>
  						<config>
 -							<eval>null,trim</eval>
 +							<eval>trim</eval>

e2e/typo3-xml/expected-result/Fixture.xml

@@ -7,7 +7,7 @@
 				<type>array</type>
 				<el>
 					<settings.nullable_field_trimmed>
-						<label>Nullable field trimmed</label>
+						<label>Nullable field -> trimmed</label>
 						<config>
 							<eval>trim</eval>
 							<nullable>true</nullable>

e2e/typo3-xml/fixtures/Fixture.xml

@@ -7,7 +7,7 @@
 				<type>array</type>
 				<el>
 					<settings.nullable_field_trimmed>
-						<label>Nullable field trimmed</label>
+						<label>Nullable field -> trimmed</label>
 						<config>
 							<eval>null,trim</eval>
 						</config>

e2e/typo3-xml/result/Fixture.xml

@@ -7,7 +7,7 @@
 				<type>array</type>
 				<el>
 					<settings.nullable_field_trimmed>
-						<label>Nullable field trimmed</label>
+						<label>Nullable field -> trimmed</label>
 						<config>
 							<eval>trim</eval>
 							<nullable>true</nullable>

packages/fractor-xml/src/XmlFileProcessor.php

@@ -48,6 +48,7 @@ public function handle(File $file, iterable $appliedRules): void
 
         // This is a hacky trick to keep format and create a nice diff later
         $oldXml = $this->saveXml($document);
+        $oldXml = str_replace('->', '->', $oldXml);
         $oldXml = $this->formatter->format($this->indent, $oldXml) . "\n";
         $file->changeOriginalContent($oldXml);