The return string from String.replaceAll() is not being used

[scuniff]

The Static Code Analyzer (Spot Bugs) flagged the following as a possible issue.

In SaveSession.java (https://github.com/fiji/3D_Viewer/blob/master/src/main/java/ij3d/SaveSession.java)

The return string from String.replaceAll() is not being used at line 587:

                    name.replaceAll(" ", "_").replaceAll("#", "--");

Should probably be:

                    name = name.replaceAll(" ", "_").replaceAll("#", "--");