anchor.diff:  // CONSOLE
   // TEST[s/^/DELETE _template\/template_1\n/]
   
  -The above will disable storing the `_source` on all `type1` types, but
  +The above will disable storing the `_source`, but
   for indices that start with `te*`, `_source` will still be enabled.
   Note, for mappings, the merging is "deep", meaning that specific
   object/property based mappings can easily be added/overridden on higher
  
positive.code:         "number_of_shards" : 1
      },
      "mappings" : {
          "type1" : {
              "_source" : { "enabled" : false }
          }
      }
  
negative.code:     "number_of_shards": 1
    },
    "mappings": {
      "_doc": {
        "_source": {
          "enabled": false
        },
  