'provider' TALES expression chokes on spaces

[altonator]

<div tal:replace="structure provider:my_content_provider" /> works fine.
But if you put a space after provider: then it fails to find the specified content provider.

Given that a content provider's name can't start with a space, and also given that "python: something()" works fine with a space in it, it seems to make sense that "provider: my_content_provider" would work with a space in it as well.

 Zope Version
(Zope 2.10.9-final, python 2.4.4, darwin)
Python Version
2.4.4 (#1, Oct 18 2006, 10:34:39) [GCC 4.0.1 (Apple Computer, Inc. build 5341)]

[Colin Watson (cjwatson)]

The zope.contentprovider project on Launchpad has been archived at the request of the Zope developers (see https://answers.launchpad.net/launchpad/+question/683589 and https://answers.launchpad.net/launchpad/+question/685285). If this bug is still relevant, please refile it at https://github.com/zopefoundation/zope.contentprovider.