https://issues.apache.org/bugzilla/show_bug.cgi?id=48815

Jesse Glick <[email protected]> changed:

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--- Comment #2 from Jesse Glick <[email protected]> 2010-03-25 16:55:32 UTC 
---
(In reply to comment #0)
> It is useful to be able to pass in arguments which may or may not be blank as 
> a
> jvmarg

You can use line="${possiblyBlank}". Unfortunately this assumes that
${possiblyBlank} contains no spaces. Best would be the ability to pass
if/unless attrs (or nested <condition>s) on <arg> variants.

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