document suggest stats being merged with search stats

docs/reference/indices/stats.asciidoc

@@ -34,7 +34,8 @@ specified as well in the URI. Those stats can be any of:
 
 `get`:: 		Get statistics, including missing stats.
 
-`search`:: 		Search statistics. You can include statistics for custom groups by adding
+`search`:: 		Search statistics including suggest statistics.
+                You can include statistics for custom groups by adding
                 an extra `groups` parameter (search operations can be associated with one or more
                 groups). The `groups` parameter accepts a comma separated list of group names.
                 Use `_all` to return statistics for all groups.
@@ -47,7 +48,6 @@ specified as well in the URI. Those stats can be any of:
 `merge`::       Merge statistics.
 `request_cache`:: <<shard-request-cache,Shard request cache>> statistics.
 `refresh`::     Refresh statistics.
-`suggest`::     Suggest statistics.
 `warmer`::      Warmer statistics.
 `translog`::    Translog statistics.
 

docs/reference/migration/migrate_5_0/index-apis.asciidoc

@@ -45,4 +45,7 @@ longer a double and is instead an object encapsulating the one-minute,
 five-minute and fifteen-minute load averages. Additionally, the recent
 CPU usage can be obtained from `OsStats.Cpu#getPercent`.
 
+==== Suggest stats
 
+Suggest stats exposed through `suggest` in indices stats has been merged
+with `search` stats. `suggest` stats is exposed as part of `search` stats.