jade xacro macro param line breaks 'string index out of range'

edit

I have been running a xacro fine in indigo and hydro but now in jade I get a string index out of range error (I also had to add the --inorder flag) from having line breaks before or after macro params:

<?xml version="1.0"?>
<robot xmlns:xacro="http://www.ros.org/wiki/xacro" name="robot">

  <xacro:macro name="all_cameras" params="
    test
    ">
  </xacro:macro>

  <xacro:all_cameras test="0.5" />

</robot>

Corrected to the following then it works in jade:

<?xml version="1.0"?>
<robot xmlns:xacro="http://www.ros.org/wiki/xacro" name="robot">

  <xacro:macro name="all_cameras" params="test">
  </xacro:macro>

  <xacro:all_cameras test="0.5" />

</robot>