installation issue: problems caused by spaces in path pointed to by DERBY_HOME or DERBY_INSTALL

[Rick Hillegas]

The following line in setEmbeddedCP.bat raises errors if there are 
spaces in the path identified by DERBY_HOME or DERBY_INSTALL:

@FOR %%X in ("%DERBY_HOME%") DO SET DERBY_HOME=%%~sX
Is this a known problem? I'm not a DOS expert and I don't know 
understand what "%%~sX" means.

Thanks for your help,
-Rick