Merge pull request #1530 from libris/feature/fix-search2-whitespace-i…

…ndex-out-of-bounds

fix(rest/search2): index of out bounds if query is whitespace or ends with 2+ whitespace

whelk-core/src/main/groovy/whelk/search2/parse/Lex.java

@@ -38,9 +38,7 @@ public static LinkedList<Symbol> lexQuery(String queryString) throws InvalidQuer
     }
 
     private static void consumeWhiteSpace(StringBuilder query, MutableInteger offset) {
-        if (query.isEmpty())
-            return;
-        while (Character.isWhitespace(query.charAt(0))) {
+        while (!query.isEmpty() && Character.isWhitespace(query.charAt(0))) {
             query.deleteCharAt(0);
             offset.increase(1);
         }