Update more files

Signed-off-by: Addisu Z. Taddese <addisu@openrobotics.org>

Author: azeey

plugins/ign-docker-env.py

@@ -118,7 +118,7 @@ def normalize_args(args):
 def main():
     try:
         ignition_version, linux_distro, docker_args, vol_args = normalize_args(
-            docopt(__doc__, version='gzdev-docker-env 0.1.0'))
+            docopt(str(__doc__), version='gzdev-docker-env 0.1.0'))
         rocker_cmd = build_rocker_command(ignition_version, linux_distro, docker_args, vol_args)
         _check_call(rocker_cmd)
     except KeyError:

plugins/repository.py

@@ -306,7 +306,7 @@ def remove_all_installed():
 
 def main():
     try:
-        args = normalize_args(docopt(__doc__,
+        args = normalize_args(docopt(str(__doc__),
                                      version='gzdev-repository 0.2.0'))
         config = load_config_file()
         validate_input(args)