Apply suggestions from code review

Co-authored-by: Thorsten Frommen <info@tfrommen.de>
Signed-off-by: Giuseppe Mazzapica <giuseppe.mazzapica@gmail.com>

docs/Application-flow.md

@@ -14,7 +14,7 @@ The `Package` class implements the two phases above, respectively, in the two me
 
 ### Single-phase VS two-phases bootstrapping
 
-It must be noted that **`Package::boot()`**, before proceeding with the "boot" phase, will execute the "build" phase if it hasn't been executed yet. In other words, it is not always necessary to explicitly call `Package::build()`, and many times calling `Package::build()` will suffice.
+It must be noted that **`Package::boot()`**, before proceeding with the "boot" phase, will execute the "build" phase if it hasn't been executed yet. In other words, it is not always necessary to explicitly call `Package::build()`, and many times calling `Package::boot()` will suffice.
 
 The following two code snippets are equivalent:
 

src/Package.php

@@ -152,6 +152,7 @@ class Package
     /** @deprecated  */
     public const STATUS_BOOTED = self::STATUS_DONE;
 
+    // Map of status to package-specific and global hook, both optional (i..e, null).
     private const STATUSES_ACTIONS_MAP = [
         self::STATUS_INIT => [self::ACTION_INIT, self::ACTION_MODULARITY_INIT],
         self::STATUS_INITIALIZED => [self::ACTION_INITIALIZED, null],