adding example

hws/01_text_justification/README.md

@@ -24,7 +24,25 @@ Let’s look at a simple example. Here is a sample input file, named example.txt
 And here’s the output produced for that input file for the three different justification modes, for the specified
 text width of 16:
 
-flush left
+**flush left**
+```txt
+--------------------
+| Here is an       |
+| example of text  |
+| justification.   |
+--------------------
+```
+
+**flush right**
+```txt
+--------------------
+|       Here is an |
+|  example of text |
+|   justification. |
+--------------------
+```
+
+**full justify**
 ```txt
 --------------------
 | Here    is    an |