composer: simplify has_changed()

lib/ansible/modules/extras/packaging/language/composer.py

@@ -109,10 +109,7 @@ def parse_out(string):
     return re.sub("\s+", " ", string).strip()
 
 def has_changed(string):
-    if "Nothing to install or update" in string:
-        return False
-    else:
-        return True
+    return "Nothing to install or update" not in string
 
 def composer_install(module, command, options):
     php_path      = module.get_bin_path("php", True, ["/usr/local/bin"])