anchor.diff:  For example, `{!prefix f=myfield v=enterp}` or `\_query_:"{!prefix f=myfield v=enterp}"` are not supported by default any longer. If you want to allow power-users to do this, set `uf=* _query_` or some other value that includes `\_query_`.
   +
   If you need full backwards compatibility for the time being, use `luceneMatchVersion=7.1.0` or something earlier.
  +
  +If you are upgrading from a version earlier than Solr 7.1, please see previous version notes below.
   
   === Solr 7.1
   
  
positive.code: 
  == Upgrading to 7.x Releases
  
  === Solr 7.3
  
  See the https://wiki.apache.org/solr/ReleaseNote73[7.3 Release Notes] for an overview of the main new features in Solr 7.3.
  
negative.code: 
  * The top-level `<highlighting>` element in `solrconfig.xml` is now officially deprecated in favour of the equivalent `<searchComponent>` syntax. This element has been out of use in default Solr installations for several releases already.
  
  If you are upgrading from a version earlier than Solr 7.2, please see previous version notes below.
  
  === Solr 7.2
  
  See the https://wiki.apache.org/solr/ReleaseNote72[7.2 Release Notes] for an overview of the main new features in Solr 7.2.
  