Solr Synonyms: Terms with spaces

[hudajkhan]

As mentioned in #1109 , synonym lines in the Solr config file may have multi-word terms where the words are separated by a space. For multi-way expansion (i.e. lines with commas where a search for any term on the line means ORing the search with all the other terms on the line), these terms are not parsed correctly. For example, the string "Public institutions, buildings" will lead to a search for "public" OR "institutions" OR "buildings" instead of "public institutions" OR "buildings"