I want to use a indent macro so I can indent my text in the description field for my tasks. Indent is so useful in formatting text that it should be a default option in JIRA.
JIRA is using it's own Wiki Renderer that is documented here:
https://jira.atlassian.com/secure/WikiRendererHelpAction.jspa?section=all
For your paritcular question, take a look at the List section.
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