Fixing some sonar warnings

Author: Björn Ekryd

sorter/src/test/java/sortpom/output/PatchedXMLWriterTest.java

@@ -14,19 +14,20 @@ class PatchedXMLWriterTest {
   @Test
   void writeXmlWithDocType() throws Exception {
     var xml =
-        "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
-            + "<!DOCTYPE xml [\n"
-            + "  <!ENTITY copy \"©\">\n"
-            + "  <!ENTITY trade \"™\">\n"
-            + "  <!ENTITY deg \"°\">\n"
-            + "  <!ENTITY gt \"&#62;\">\n"
-            + "  <!ENTITY sup2 \"²\">\n"
-            + "  <!ENTITY frac14 \"¼\">\n"
-            + "  <!ENTITY quot \"&#34;\">\n"
-            + "  <!ENTITY frac12 \"½\">\n"
-            + "  <!ENTITY euro \"€\">\n"
-            + "  <!ENTITY Omega \"Ω\">\n"
-            + "]><root/>";
+        """
+            <?xml version="1.0" encoding="UTF-8"?>
+            <!DOCTYPE xml [
+              <!ENTITY copy "©">
+              <!ENTITY trade "™">
+              <!ENTITY deg "°">
+              <!ENTITY gt "&#62;">
+              <!ENTITY sup2 "²">
+              <!ENTITY frac14 "¼">
+              <!ENTITY quot "&#34;">
+              <!ENTITY frac12 "½">
+              <!ENTITY euro "€">
+              <!ENTITY Omega "Ω">
+            ]><root/>""";
 
     var reader = new SAXReader();
     reader.setIncludeInternalDTDDeclarations(true);

sorter/src/test/java/sortpom/output/XmlOutputGeneratorTest.java

@@ -70,8 +70,12 @@ void definedParentNamespaceShouldBeReused() {
         sortedXml,
         is(
             equalTo(
-                "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<Gurka xmlns:namespace=\"this is a uri\">\n"
-                    + "<child namespace:attr1=\"value\"></child>\n</Gurka>\n")));
+                """
+                    <?xml version="1.0" encoding="UTF-8"?>
+                    <Gurka xmlns:namespace="this is a uri">
+                    <child namespace:attr1="value"></child>
+                    </Gurka>
+                    """)));
   }
 
   @Test
@@ -95,8 +99,12 @@ void redefinedParentNamespaceShouldBeWrittenAgain() {
         sortedXml,
         is(
             equalTo(
-                "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<Gurka xmlns:namespace=\"this is a uri\">\n"
-                    + "<child xmlns:namespace=\"another uri\" namespace:attr1=\"value\"></child>\n</Gurka>\n")));
+                """
+                    <?xml version="1.0" encoding="UTF-8"?>
+                    <Gurka xmlns:namespace="this is a uri">
+                    <child xmlns:namespace="another uri" namespace:attr1="value"></child>
+                    </Gurka>
+                    """)));
   }
 
   @Test