task: Explanations and grammar fixes for all the GoF patterns (#1791)

* Grammatical fixes to command pattern

* Update bridge pattern readme

* Fixes to builder pattern grammar

* Update chain of responsibility

* Improvements to the composite example

* Fixes to headings

* Minor updates to decorator pattern

* Update facade

* Update factory example

* Update factory method

* Update flyweight

* Interpreter explanation

* Update iterator readme

* Add explanation for mediator pattern

* Grammatical fixes to memento

* Grammar fixes for observer

* Update explanation for the prototype pattern

* Proxy pattern grammar fixes

* Update singleton

* Grammar fixes to state pattern

* Grammar fixes for strategy

* Grammar fixes, template method

* Grammar fixes for visitor

* Fix typo

flyweight/src/main/java/com/iluwatar/flyweight/AlchemistShop.java

@@ -78,12 +78,12 @@ public class AlchemistShop {
   }
 
   /**
-   * Enumerate potions.
+   * Drink all the potions.
    */
-  public void enumerate() {
-    LOGGER.info("Enumerating top shelf potions\n");
+  public void drinkPotions() {
+    LOGGER.info("Drinking top shelf potions");
     topShelf.forEach(Potion::drink);
-    LOGGER.info("Enumerating bottom shelf potions\n");
+    LOGGER.info("Drinking bottom shelf potions");
     bottomShelf.forEach(Potion::drink);
   }
 }

flyweight/src/main/java/com/iluwatar/flyweight/App.java

@@ -43,7 +43,9 @@ public class App {
    * @param args command line args
    */
   public static void main(String[] args) {
+    // create the alchemist shop with the potions
     var alchemistShop = new AlchemistShop();
-    alchemistShop.enumerate();
+    // a brave visitor enters the alchemist shop and drinks all the potions
+    alchemistShop.drinkPotions();
   }
 }