java 17 cleanup

Author: rbri

src/main/java/org/htmlunit/xpath/axes/ReverseAxesWalker.java

@@ -115,10 +115,9 @@ protected int getProximityPosition(final int predicateIndex) {
                 wi().setLastUsedWalker(clone);
 
                 // Count 'em all
-                count++;
-                while (DTM.NULL != clone.nextNode()) {
+                do {
                     count++;
-                }
+                } while (DTM.NULL != clone.nextNode());
 
                 m_proximityPositions[predicateIndex] = count;
             }

src/main/java/org/htmlunit/xpath/compiler/OpMapVector.java

@@ -30,7 +30,7 @@ public class OpMapVector {
   protected int[] m_map; // IntStack is trying to see this directly
 
   /** Position where size of array is kept */
-  protected int m_lengthPos;
+  protected final int m_lengthPos;
 
   /** Size of array */
   protected int m_mapSize;

src/main/java/org/htmlunit/xpath/res/XPATHErrorResources.java

@@ -231,7 +231,7 @@ public Object[][] getContents() {
       // the characters specified by the substitution text were encountered instead.
       {
         ER_EXPECTED_LOC_PATH,
-        "A location path was expected, but the following token was encountered\u003a  {0}"
+        "A location path was expected, but the following token was encountered:  {0}"
       },
 
       // Note to translators: A location path is a form of XPath expression.

src/main/java/org/htmlunit/xpath/xml/dtm/ref/DTMNodeProxy.java

@@ -913,7 +913,7 @@ else if (prefix != null && prefix.equals(specifiedPrefix)) {
               final String attrPrefix = attr.getPrefix();
               final String value = attr.getNodeValue();
               namespace = attr.getNamespaceURI();
-              if (namespace != null && "http://www.w3.org/2000/xmlns/".equals(namespace)) {
+              if ("http://www.w3.org/2000/xmlns/".equals(namespace)) {
                 // at this point we are dealing with DOM Level 2 nodes only
                 if (specifiedPrefix == null && "xmlns".equals(attr.getNodeName())) {
                   // default namespace