Improve some comments

Author: gabotechs

src/coordinator/prepare_static_plan.rs

@@ -19,8 +19,9 @@ use rand::Rng;
 use std::sync::Arc;
 
 /// Prepares the distributed plan for execution, which implies:
-/// 1. Perform some worker assignation, choosing randomly from the given URLs and assigning one
-///    URL per task.
+/// 1. Perform some worker URL assignation, choosing either:
+///    - The URLs set by the user with [crate::TaskEstimator::route_tasks].
+///    - Randomly otherwise
 /// 2. Sending the sliced subplans to the assigned URLs. For each URL assigned to a task, a
 ///    network call feeding the subplan is necessary.
 /// 3. In each network boundary, set the input plan to `None`. That way, network boundaries

src/coordinator/task_spawner.rs

@@ -262,9 +262,8 @@ impl<'a> CoordinatorToWorkerTaskSpawner<'a> {
         });
     }
 
-    /// Instantiates and returns the task that based on the different local [WorkUnitFeedExec]
-    /// nodes, sends their inner [WorkUnitFeeds] over the network to their remote counterparts.
-    /// The returned task is just a future that does nothing unless polled.
+    /// Launches the task that based on the different local [WorkUnitFeedExec] nodes, sends their
+    /// inner [WorkUnitFeeds] over the network to their remote counterparts.
     ///
     /// Once this function is called, all the [WorkUnitFeedExec]s feeds will be consumed.
     pub(super) fn work_unit_feed_task(