Inline documentation

Author: estolfo

elasticsearch/lib/elasticsearch.rb

@@ -61,7 +61,8 @@ def method_missing(name, *args, &block)
         # The signature for perform_request is:
         # method, path, params, body, headers, opts
         # The last arg is opts, which shouldn't be sent when `perform_request` is called
-        # directly.
+        # directly. Check if :endpoint is a key, which means it's the extra identifier
+        # used for OpenTelemetry.
         args.pop if args[-1][:endpoint]
         if (opaque_id = args[2]&.delete(:opaque_id))
           headers = args[4] || {}