It got transformed so try this

source : "../show?rev=vc_port"
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Please ask your questions in forum, this tracker is for bugs and feature requests only.

BTW, you're not using the source syntax adequately, see "wiki syntax help page":/help/wiki_syntax.html (use e.g. source:/branches/1.2-stable/README.rdoc).
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SPAM
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Sorry I wasn't clear enough, but with my git repository it doesn't work the syntax you are suggesting.

For example in my case I would be able to do

source:/branches/vc_port/README.txt

It opens the link but I get the following error:

<pre>

404

The entry or revision was not found in the repository.

Back
</pre>

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The forum entry for this seems to be "Link to respository file on branch":http://www.redmine.org/boards/2/topics/22548.

However, there currently is no solution to link to a file in a specific git branch.
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I found the solution to link to a file in a specific branch of the linked git repository:
<pre>
source:"../revisions/branch_name/entry/path/to/the/file"
</pre>
Simply replace branch_name by the name of the specific branch and replace the path of the file at the end.
You *must* put the quotes around the path, otherwise the .. will not be parsed correctly.
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