New refactoring - Use multi catch

[JnRouvignac]

Given

The following code:

        try {
            obj.throwingMethod();
        } catch (IllegalArgumentException iae) {
            iae.printStackTrace();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        }

When

... automatic refactorings are applied ...

Then

Refactor the code to:

        try {
            obj.throwingMethod();
        } catch (IllegalArgumentException | IOException iae) {
            iae.printStackTrace();
        }