fix: bug 1570 - Adding then removing a capability can fail. e.g. ALL -TCB TCB
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Users' Flow Diagram
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.. raw:: html
<img src="images/user-graph.dot.png" alt="Flow Diagram" usemap="#flowdiagram" style="border-style: none"/>
<map name="flowdiagram" id="flowdiagram">
.. raw:: html
:file: user-graph.dot.cmap
.. raw:: html
</map>