fix release.Dockerfile: update installation verification messages for…

… clarity

docker/release.Dockerfile

@@ -38,7 +38,7 @@ ADD doc/sphinx/source/tutorial_notebooks ./tutorial_notebooks
 # install
 RUN /usr/local/bin/pip install $PACKAGE_HOME
 
-# Make sure the environment is activated:
+# Make sure the everything is installed ok
 RUN /bin/bash -c echo "Make sure pointcloudset is installed:"
 RUN /bin/bash -c "python -c 'import pointcloudset; print(pointcloudset.__version__); from pointcloudset import Dataset'"
 RUN /bin/bash -c "pointcloudset --help || (echo 'CLI not installed' && exit 1)"