Bug 572618 - [cleanup] "Use instanceof" has a wrong preview

Change-Id: I7ced23a6fa8d1de4ffcba12ab2b1a3766656ffe6
Signed-off-by: Fabrice Tiercelin <fabrice.tiercelin@yahoo.fr>
diff --git a/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/fix/InstanceofCleanUp.java b/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/fix/InstanceofCleanUp.java
index b251a79..1481a7f 100644
--- a/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/fix/InstanceofCleanUp.java
+++ b/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/fix/InstanceofCleanUp.java
@@ -78,10 +78,10 @@
 	@Override
 	public String getPreview() {
 		if (isEnabled(CleanUpConstants.INSTANCEOF)) {
-			return "String isRightType = (o instanceof String);\n"; //$NON-NLS-1$
+			return "boolean isRightType = (o instanceof String);\n"; //$NON-NLS-1$
 		}
 
-		return "String isRightType = String.class.isInstance(o);\n"; //$NON-NLS-1$
+		return "boolean isRightType = String.class.isInstance(o);\n"; //$NON-NLS-1$
 	}
 
 	@Override