root@5db542db3336:/workspace# diff a.py b.py
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< class LiteralInclude(SphinxDirective):
---
> class ExampleInclude(SphinxDirective):
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<     Like ``.. include:: :literal:``, but only warns if the include file is
<     not found, and does not raise errors.  Also has several options for
<     selecting what to include.
---
>     Like ``.. literalinclude:: ``, but it does not support caption option.
>     Adds a header with a reference to  the full source code
>
>     Based on:
>     https://raw.githubusercontent.com/sphinx-doc/sphinx/v1.8.3/sphinx/directives/code.py
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<         "caption": directives.unchanged,
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<         # type: () -> List[nodes.Node]
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<                         __("line number spec is out of range(1-%d): %r")
<                         % (lines, self.options["emphasize-lines"]),
<                         location=location,
---
>                         "line number spec is out of range(1-%d): %r", lines, self.options["emphasize-lines"]
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<             if "caption" in self.options:
<                 caption = self.options["caption"] or self.arguments[0]
<                 retnode = container_wrapper(self, retnode, caption)
<
<             # retnode will be note_implicit_target that is linked from caption and numref.
<             # when options['name'] is provided, it should be primary ID.
<             self.add_name(retnode)
---
>             container_node = nodes.container("", literal_block=True, classes=["example-block-wrapper"])
>             container_node += example_header(filename=filename)
>             container_node += retnode
>             retnode = container_node