Big space and tab cleanup

Remove all space before tabs and space and tabs at end of lines.
diff --git a/xpath.c b/xpath.c
index 6552e1b..c3236ed 100644
--- a/xpath.c
+++ b/xpath.c
@@ -7798,7 +7798,7 @@
 #ifdef LIBXML_DOCB_ENABLED
 	    case XML_DOCB_DOCUMENT_NODE:
 #endif
-	    case XML_HTML_DOCUMENT_NODE:	    
+	    case XML_HTML_DOCUMENT_NODE:
 		return(contextNode);
 	    default:
 		return(NULL);
@@ -12561,7 +12561,7 @@
         if ((predOp != NULL) && (seq->nodeNr > 0)) {
 	    /*
 	    * E.g. when we have a "/foo[some expression][n]".
-	    */	    
+	    */
 	    /*
 	    * QUESTION TODO: The old predicate evaluation took into
 	    *  account location-sets.
@@ -12570,7 +12570,7 @@
 	    *  All what I learned now from the evaluation semantics
 	    *  does not indicate that a location-set will be processed
 	    *  here, so this looks OK.
-	    */	    
+	    */
 	    /*
 	    * Iterate over all predicates, starting with the outermost
 	    * predicate.