examples: don't intern symbols in asdf-with-deps

examples/asdf_with_dependence/example-with-dep.asd

@@ -1,5 +1,5 @@
-(defsystem :example-with-dep
+(defsystem #:example-with-dep
   :serial t
-  :depends-on (:alexandria)
+  :depends-on (#:alexandria)
   :components ((:file "package")
 	       (:file "example")))

examples/asdf_with_dependence/example.lisp

@@ -1,4 +1,4 @@
-(in-package :example)
+(in-package #:example)
 
 (defun test-function (n)
   (format t "Factorial of ~a is: ~a~%" n (alexandria:factorial n)))

examples/asdf_with_dependence/package.lisp

@@ -1,5 +1,5 @@
 (in-package :cl-user)
 
-(defpackage :example
-  (:use :cl)
-  (:export :test-function))
+(defpackage #:example
+  (:use #:cl)
+  (:export #:test-function))