Simple test case to fix:
[subbu@earth tests] echo " [[Category:Foo]]" | node parse
<body data-parsoid="{}"><pre data-parsoid='{"dsr":[0,17,1,0]}'><link rel="mw:WikiLink/Category" href="./Category:Foo" data-parsoid='{"stx":"simple","a":{"href":"./Category:Foo"},"sa":{"href":"Category:Foo"},"dsr":[1,17,null,null]}'></pre>
</body>
Version: unspecified
Severity: normal