fix broken test by correcting off-by-one error in RegexBasedLocationExtractionStrategy

DEVSIX-1816

Author: Joris Schellekens

kernel/src/main/java/com/itextpdf/kernel/pdf/canvas/parser/listener/RegexBasedLocationExtractionStrategy.java

@@ -88,7 +88,7 @@ public Collection<IPdfTextLocation> getResultantLocations() {
         while (mat.find()) {
             int startIndex = txt.indexMap.get(mat.start());
             int endIndex = txt.indexMap.get(mat.end() - 1);
-            for (Rectangle r : toRectangles(parseResult.subList(startIndex, endIndex))) {
+            for (Rectangle r : toRectangles(parseResult.subList(startIndex, endIndex + 1))) {
                 retval.add(new DefaultPdfTextLocation(0, r, mat.group(0)));
             }
         }

kernel/src/test/java/com/itextpdf/kernel/pdf/canvas/parser/listener/RegexBasedLocationExtractionStrategyTest.java

@@ -89,7 +89,7 @@ public void test01() throws IOException {
         Assert.assertEquals(loc.getText(), "{{Signature}}");
         Assert.assertEquals(23, (int) loc.getRectangle().getX());
         Assert.assertEquals(375, (int) loc.getRectangle().getY());
-        Assert.assertEquals(52, (int) loc.getRectangle().getWidth());
+        Assert.assertEquals(55, (int) loc.getRectangle().getWidth());
         Assert.assertEquals(11, (int) loc.getRectangle().getHeight());
 
         // close