LineNumberRulerColumn consider LineSpacing for word wrapping

The LineNumberRulerColumn should consider the text widget's LineSpacing when word wrapping is enabled.

Fixes #2668

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

@@ -852,6 +852,7 @@ void doPaint(GC gc, ILineRange visibleLines) {
 
 				// use height of text bounding because bounds.width changes on word wrap
 				y+= fCachedTextWidget.getTextBounds(offsetAtLine, offsetEnd).height;
+				y+= fCachedTextWidget.getLineSpacing();
 			}
 		}
 	}