[Solr Wiki] Trivial Update of "SolrPlugins" by IanHolsman

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The following page has been changed by IanHolsman:
http://wiki.apache.org/solr/SolrPlugins

The comment on the change is:
fix spelling (minor)

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  === Similarity ===
  
- The [http://lucene.apache.org/java/docs/api/org/apache/lucene/search/Similarity.html Similarity] class is a native lucene concept that determines how much of hte score calculations for the various types of queries are executed. For more information on how the methods in the Similarity class are used, consult the [http://lucene.apache.org/java/docs/scoring.html Lucene scoring documentation].  If you wish to override the !DefaultSimilarity provided by Lucene, you can specify your own subclass in your [wiki:SchemaXml schema.xml]...
+ The [http://lucene.apache.org/java/docs/api/org/apache/lucene/search/Similarity.html Similarity] class is a native lucene concept that determines how much of the score calculations for the various types of queries are executed. For more information on how the methods in the Similarity class are used, consult the [http://lucene.apache.org/java/docs/scoring.html Lucene scoring documentation].  If you wish to override the !DefaultSimilarity provided by Lucene, you can specify your own subclass in your [wiki:SchemaXml schema.xml]...
  
  {{{
    <similarity class="my.package.CustomSimilarity"/>