Rendering error with i18n:msg attribute

[rblank]

The following snippet renders incorrectly in Trac (anydiff of two paths, changeset view):

<h1 py:when="not changeset and not restricted" i18n:msg="reponame, old_path, old_rev, new_path, new_rev">
  Changes<py:if test="reponame"> in $reponame</py:if>
  from <a title="Show entry in browser" href="${href.browser(reponame, old_path, rev=old_rev)}">$old_path</a>
  at <a title="Show full changeset" href="${href.changeset(old_rev, reponame)}">r$old_rev</a>
  to <a title="Show entry in browser" href="${href.browser(reponame, new_path, rev=new_rev)}">$new_path</a>
  at <a title="Show full changeset" href="${href.changeset(new_rev, reponame)}">r$new_rev</a>
</h1>

The result is:

<h1>Changes
  from <a title="Show entry in browser" href="/browser/branches/0.11-stable/trac/util?rev=8271">branches/0.11-stable/trac/util</a>
  at <a title="Show full changeset" href="/changeset/8271/trac">r8271</a><a title="Show entry in browser" href="/browser/trunk/trac/util?rev=8271">trunk/trac/util</a>
  at <a title="Show full changeset" href="/changeset/8271/trac">r8271</a></h1>

Note how the "to" (in "Changes from ... at ... to ... at ...") as well as some whitespace are missing.

See  here for the rendering of this example, and note the missing "to" in the heading.

[cboos]

Oh, that must be because of the <py:if test="reponame"> in $reponame</py:if>. Conditionals in i18n:msg are not supported (#372). I'll try to fix that.

But it's true that there are still errors with i18n:msg, when trying to fix  #T9159 I stumbled upon a similar issue, and that one didn't imply any embedded py: directive. More details on this problem later.

[rblank]

Oh, right, my bad. I tried separating the py:when from the i18n:msg, but I didn't think about the contained py:if.

So I guess we can close this as a duplicate, then?

[cboos]

Ok, I'll another one later with the issue for  #T9159.

Duplicate of #372.