Process email field value seems to prefixed with a space in rules

I'm using rules to send an email based on stuff submitted in a webform. However for some reason when I use the processed value of a field (in this case an email field) it seems to be prefixing the value with a space.

So my email subject in rules is:
subscribe [data:e_mail_list-value-raw]pass address=[data:email-value]
which should result in something like this:
subscribe epaperpass address=user@domain.com
What I actually get is:
subscribe epaperpass address= user@domain.com (not the space after the equals)
If I use:
subscribe [data:e_mail_list-value-raw]pass address=[data:email-value-raw]
then its ok but surely thats not right I can't see any good reason why a processed value should be pre-pended with a space?

I have a similar issue with the actual content of the mail too which has:
Subscribing [data:email-value] to [data:e_mail_list-value]

And I get an extra space before the email address