<document source="subrefinlineblk.rst">
    <paragraph>
        This file shows a bug that occurred when parsing line blocks where
        lines begin with a substitution reference.
    <substitution_definition names="sub1">
        Line 1
    <substitution_definition names="sub2">
        Line 2
    <line_block>
        <line>
            Line 1
             here.
        <line>
            Line 2
             here.