Terms query for groups doesn't handle spaces

[cjcolvar]

I have groups that have spaces in them and this results in a bad solr query. A simplified query results in the following:

{'responseHeader'=>{'status'=>400,'QTime'=>0,'params'=>{'fq'=>'({!terms f=edit_access_group_ssim}public 2,test)','wt'=>'ruby'}},'error'=>{'metadata'=>['error-class','org.apache.solr.common.SolrException','root-error-class','org.apache.solr.common.SolrException'],'msg'=>'no field name specified in query and no default specified via \'df\' param','code'=>400}}

If we nest the terms query, it magically works:

{'responseHeader'=>{'status'=>0,'QTime'=>0,'params'=>{'fq'=>'_query_:"{!terms f=edit_access_group_ssim}public 2,test"','wt'=>'ruby'}},'response'=>{'numFound'=>0,'start'=>0,'maxScore'=>0.0,'docs'=>[]},'facet_counts'=>{'facet_queries'=>{},'facet_fields'=>{},'facet_ranges'=>{},'facet_intervals'=>{},'facet_heatmaps'=>{}}}

I tried escaping the term with a space in various ways including using a different separator but nothing seemed to work except nesting.