emitting invalid xml:space="preserve" attributes on wiki and ticket pages (causes failed W3C validation)

[Daniel Kahn Gillmor <dkg-debian.org@…>]

I'm running ​a newly-updated trac site on version 0.11b1, using genshi 0.4.4.

When ​testing it against the W3C's XHTML validator, it is almost entirely compliant output, with one exception:

 Line 65, Column 49: there is no attribute "xml:space".
      <div class="wikipage searchable" xml:space="preserve">

The W3C itself ​says that this is legitimate XML, but that it must be "declared if it is used". i'm not enough of a web standards guru to be able to tell what that means, or where to fix the problem (is it a problem with genshi? with trac? with the W3C validator?)

Trac itself is so close to full validation that it would be a real shame for this one thing to slip through.

[Christian Boos]

This is done on purpose, in order to workaround the #3925 issue.

Real fix should be done in the WikiEngine refactoring, see TracDev/Proposals/WikiParserFormatterSplit#Technicaldetails.

[Markus.Staab]

note: the roadmap page is also affected

[Christian Boos]

Looks like this should be no longer the case with recent Genshi (≥ ​[G805]).

I keep the ticket open as a reminder to get rid of r5586 once the Wiki formatter emits <pre> elements.

[Christian Boos]

Replying to cboos:

… a reminder to get rid of r5586 once the Wiki formatter emits <pre> elements.

If it emits <pre> elements one day. See caveat in #8770.