Docs: Try to fix showing external example in ReadTheDocs
The old variant worked locally. Hopefully the new one works also
remotely.
@@ -58,7 +58,7 @@ The following example visitor modifies the test suite structure it visits.
It could be used, for example, with Robot Framework's ``--prerunmodifier``
option to modify test data before execution.
-.. literalinclude:: /../../doc/api/code_examples/SelectEveryXthTest.py
+.. literalinclude:: ../../../doc/api/code_examples/SelectEveryXthTest.py
For more examples it is possible to look at the source code of visitors used
internally by Robot Framework itself. Some good examples are
