Correction indentation

generate.py

@@ -1056,7 +1056,7 @@ if __name__ == "__main__":
             "type="])
     except(getopt.GetoptError, err):
         # print help information and exit:
-        print str(err) # will print something like "option -a not recognized"
+        print(str(err)) # will print something like "option -a not recognized"
         usage()
         sys.exit(2)
     ctx={ "base": os.path.abspath(os.curdir), "root": os.path.abspath(os.curdir), "platform": "?-?-?", "platforms": [], "externals": {} }