Lucene.Net.Grouping.GroupingSearch::Search(): Fixed typo in error message and throw InvalidOperationException
Lucene.Net.Grouping.GroupingSearch::Search(): Fixed typo in error message and throw InvalidOperationException

NightOwl888/lucenenet,jeme/lucenenet,NightOwl888/lucenenet,jeme/lucenenet,NightOwl888/lucenenet,apache/lucenenet,apache/lucenenet,apache/lucenenet,jeme/lucenenet,NightOwl888/lucenenet,jeme/lucenenet,apache/lucenenet