"enable" parameter doesn't accept multiple tracks

[nathanweeks]

The "GBrowse Configuration/URL schema" documentation (http://gmod.org/wiki/GBrowse_Configuration/URL_schema) states that for the "enable" and "disable"parameters, multiple tracks can be specified by specifying the track names separated by "+" or "-" characters; however, this does not appear to work; e.g., with the default "yeast" data source:

http://localhost/gb2/gbrowse/yeast/?enable=ncRNA-LTRs

Using multiple "enable" or "disable" parameters does appear to work; however:

http://localhost/gb2/gbrowse/yeast/?enable=LTRs;enable=ncRNA