Added missing gitinspector tag to the XML output of the version flag.

This got accidentally removed when the implementation of the footer and
header functions in the format module were added.

gitinspector.py

@@ -102,7 +102,9 @@ if __name__ == "__main__":
 			elif o in("-r", "--responsibilities"):
 				__run__.responsibilities = True
 			elif o in("--version"):
+				format.output_header()
 				format.call_output_function(version.output_html, version.output_text, version.output_xml)
+				format.output_footer()
 				sys.exit(0)
 			elif o in("--grading"):
 				__run__.include_metrics = True

version.py

@@ -34,7 +34,7 @@ def output_html(string, _):
 def output_text(_):
 	print("gitinspector {0}\n".format(__version__) + __doc__)
 
-def output_xml(_):
+def output_xml():
 	license_text = "\t\t" + __doc__.replace("\n", "\n\t\t")
-	print(string.format("\n\t<version>" + __version__ + "</version>\n" +
-	                    "\t<license-text>\n" + license_text + "\n\t</license-text>\n"))
+	print("\t<version>" + __version__ + "</version>\n" +
+	      "\t<license-text>\n" + license_text + "\n\t</license-text>")