add listing to txt

Author: habibasorour

source/ch9_commonmistakes.ptx

@@ -80,7 +80,7 @@
         </program>
         </listing>
         <p>
-            The error "';' expected" on line 7 of <c>Histo.java</c> means that a semicolon is missing at the end of the statement <c>Scanner data = null</c>. In Java, every statement must be terminated with a semicolon (<c>;</c>) to indicate its completion. The arrow points to <c>null</c> because that's where the compiler expected to find the semicolon.
+            The error "';' expected" on line 7 of <c>Histo.java</c> in <xref ref="semicolon-error" text="type-global"/> means that a semicolon is missing at the end of the statement <c>Scanner data = null</c>. In Java, every statement must be terminated with a semicolon (<c>;</c>) to indicate its completion. The arrow points to <c>null</c> because that's where the compiler expected to find the semicolon.
         </p>
 
     </section>