Address review comments

src/core/ext/client_config/lb_policy.h

@@ -125,8 +125,8 @@ void grpc_lb_policy_init(grpc_lb_policy *policy,
 /** Given initial metadata in \a initial_metadata, find an appropriate
     target for this rpc, and 'return' it by calling \a on_complete after setting
     \a target.
-    Picking can be asynchronous. Any IO should be done under the pollset_set
-    interested_parties. */
+    Picking can be asynchronous. Any IO should be done under the \a
+    interested_parties \a grpc_pollset_set in the \a grpc_lb_policy struct. */
 int grpc_lb_policy_pick(grpc_exec_ctx *exec_ctx, grpc_lb_policy *policy,
                         grpc_metadata_batch *initial_metadata,
                         uint32_t initial_metadata_flags,

src/core/ext/lb_policy/grpclb/grpclb.c

@@ -761,7 +761,7 @@ static lb_client_data *lb_client_data_create(glb_lb_policy *glb_policy) {
 
   /* Note the following LB call progresses every time there's activity in \a
    * glb_policy->base.interested_parties, which is comprised of the polling
-   * entities from client_channel. */
+   * entities from \a client_channel. */
   lb_client->lb_call = grpc_channel_create_pollset_set_call(
       glb_policy->lb_channel, NULL, GRPC_PROPAGATE_DEFAULTS,
       glb_policy->base.interested_parties, "/BalanceLoad",