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

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

@@ -45,14 +45,13 @@ public class App {
    * @param args command line args
    */
   public static void main(String[] args) {
+
+    var messenger = new Messenger();
+
     LOGGER.info("Message from the orcs: ");
+    messenger.messageFromOrcs().print();
 
-    var orcMessage = new Messenger().messageFromOrcs();
-    orcMessage.print();
-
-    LOGGER.info("\nMessage from the elves: ");
-
-    var elfMessage = new Messenger().messageFromElves();
-    elfMessage.print();
+    LOGGER.info("Message from the elves: ");
+    messenger.messageFromElves().print();
   }
 }

composite/src/main/java/com/iluwatar/composite/Sentence.java

@@ -39,6 +39,6 @@ public class Sentence extends LetterComposite {
 
   @Override
   protected void printThisAfter() {
-    System.out.print(".");
+    System.out.print(".\n");
   }
 }