Increase the height of bracket selection by one point

In some zoom level the highlight is too close to the text and cutoff
sometimes.

Author: ShahzaibIbrahim

bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/source/MatchingCharacterPainter.java

@@ -264,7 +264,7 @@ private void draw(final GC gc, final int offset) {
 			final String matchingCharacter= fTextWidget.getText(offset, offset);
 			Point characterBounds= gc.textExtent(matchingCharacter);
 			final int height= fTextWidget.getCaret().getSize().y;
-			characterBounds.y= height - 1;
+			characterBounds.y= height;
 			Rectangle hightlightingArea= Rectangle.of(new Point(bounds.x, bounds.y + bounds.height - height), characterBounds);
 
 			// draw box around line segment