Add space

Author: kirbyk

source/applications/indexes.txt

@@ -26,7 +26,7 @@ application and whether the query justifies an index.
 The best overall strategy for designing indexes is to profile a
 variety of index configurations with data sets similar to the ones
 you'll be running in production to see which configurations perform
-best.Inspect the current indexes created for your collections to
+best. Inspect the current indexes created for your collections to
 ensure they are supporting your current and planned queries. If an
 index is no longer used, drop the index.