[DOCS] Updates API source code documentation

Author: picandocodigo

elasticsearch-api/lib/elasticsearch/api/actions/indices/get_index_template.rb

@@ -21,7 +21,7 @@ module Indices
       module Actions
         # Returns an index template.
         #
-        # @option arguments [List] :name The comma separated names of the index templates
+        # @option arguments [String] :name A pattern that returned template names must match
         # @option arguments [Boolean] :flat_settings Return settings in flat format (default: false)
         # @option arguments [Time] :master_timeout Explicit operation timeout for connection to master node
         # @option arguments [Boolean] :local Return local information, do not retrieve the state from master node (default: false)

elasticsearch-api/lib/elasticsearch/api/actions/nodes/info.rb

@@ -22,7 +22,7 @@ module Actions
         # Returns information about nodes in the cluster.
         #
         # @option arguments [List] :node_id A comma-separated list of node IDs or names to limit the returned information; use `_local` to return information from the node you're connecting to, leave empty to get information from all nodes
-        # @option arguments [List] :metric A comma-separated list of metrics you wish returned. Leave empty to return all. (options: settings, os, process, jvm, thread_pool, transport, http, plugins, ingest)
+        # @option arguments [List] :metric A comma-separated list of metrics you wish returned. Use `_all` to retrieve all metrics and `_none` to retrieve the node identity without any additional metrics. (options: settings, os, process, jvm, thread_pool, transport, http, plugins, ingest, indices, aggregations, _all, _none)
         # @option arguments [Boolean] :flat_settings Return settings in flat format (default: false)
         # @option arguments [Time] :timeout Explicit operation timeout
         # @option arguments [Hash] :headers Custom HTTP headers

elasticsearch-api/lib/elasticsearch/api/actions/nodes/stats.rb

@@ -23,7 +23,7 @@ module Actions
         #
         # @option arguments [List] :node_id A comma-separated list of node IDs or names to limit the returned information; use `_local` to return information from the node you're connecting to, leave empty to get information from all nodes
         # @option arguments [List] :metric Limit the information returned to the specified metrics (options: _all, breaker, fs, http, indices, jvm, os, process, thread_pool, transport, discovery, indexing_pressure)
-        # @option arguments [List] :index_metric Limit the information returned for `indices` metric to the specific index metrics. Isn't used if `indices` (or `all`) metric isn't specified. (options: _all, completion, docs, fielddata, query_cache, flush, get, indexing, merge, request_cache, refresh, search, segments, store, warmer, suggest, shards)
+        # @option arguments [List] :index_metric Limit the information returned for `indices` metric to the specific index metrics. Isn't used if `indices` (or `all`) metric isn't specified. (options: _all, completion, docs, fielddata, query_cache, flush, get, indexing, merge, request_cache, refresh, search, segments, store, warmer, suggest, shard_stats)
         # @option arguments [List] :completion_fields A comma-separated list of fields for `fielddata` and `suggest` index metric (supports wildcards)
         # @option arguments [List] :fielddata_fields A comma-separated list of fields for `fielddata` index metric (supports wildcards)
         # @option arguments [List] :fields A comma-separated list of fields for `fielddata` and `completion` index metric (supports wildcards)