updated comments in shell script

cython/scripts/install.sh

@@ -16,7 +16,8 @@ then
     exit 1;
 fi
 
-# Set cython directory permissions to user so we don't get permission denied
+# Set cython directory permissions to user so we don't get permission denied.
+# This also works inside Docker containers.
 if [ "$(whoami)" != "root" ]
 then
     sudo chown -R $(logname) ${GTSAM_CYTHON_INSTALL_PATH}
@@ -24,6 +25,6 @@ else
     chown -R $(logname) ${GTSAM_CYTHON_INSTALL_PATH}
 fi
 
-# Run setup.py install with full paths
+# Run setup.py install with full paths.
 echo "Running setup.py in $PACKAGE_PATH"
 ${PYTHON_EXECUTABLE} $PACKAGE_PATH/setup.py install