[minor] Fixed the doc of a test

examples/provider-sync.rs

@@ -24,7 +24,6 @@ pub const URL: &str = "https://my.server.com/remote.php/dav/files/john";
 pub const USERNAME: &str = "username";
 pub const PASSWORD: &str = "secret_password";
 
-pub const EXAMPLE_TASK_URL: &str =              "https://my.server.com/remote.php/dav/calendars/john/6121A0BE-C2E0-4F16-A3FA-658E54E7062A/74439558-CDFF-426C-92CD-ECDDACE971B0.ics";
 pub const EXAMPLE_EXISTING_CALENDAR_URL: &str = "https://my.server.com/remote.php/dav/calendars/john/a_calendar_name/";
 pub const EXAMPLE_CREATED_CALENDAR_URL: &str =  "https://my.server.com/remote.php/dav/calendars/john/a_calendar_that_we_have_created/";
 
@@ -41,7 +40,6 @@ async fn main() {
     println!("This will use the following settings:");
     println!("  * URL = {}", URL);
     println!("  * USERNAME = {}", USERNAME);
-    println!("  * EXAMPLE_TASK_URL = {}", EXAMPLE_TASK_URL);
     println!("  * EXAMPLE_EXISTING_CALENDAR_URL = {}", EXAMPLE_EXISTING_CALENDAR_URL);
     println!("  * EXAMPLE_CREATED_CALENDAR_URL = {}", EXAMPLE_CREATED_CALENDAR_URL);
     pause();
@@ -63,6 +61,8 @@ async fn main() {
     kitchen_fridge::utils::print_calendar_list(&cals).await;
 
     println!("Starting a sync...");
+    println!("Depending on your RUST_LOG value, you may see more or less details about the progress.");
+    // Note that we could use sync_with_feedback() to have better and formatted feedback
     if provider.sync().await == false {
         log::warn!("Sync did not complete, see the previous log lines for more info. You can safely start a new sync.");
     }