Indenting differences causes multiple identical msgids

[jruigrok]

Given two identical HTML snippets:

    <div id="help" i18n:msg=""><strong>Note:</strong> See
      <a href="${href.wiki('TracRoadmap')}">TracRoadmap</a> for help on using
      the roadmap.
    </div>

and

      <div id="help" i18n:msg=""><strong>Note:</strong> See
        <a href="${href.wiki('TracRoadmap')}">TracRoadmap</a> for help on using
        the roadmap.
      </div>

Genshi's extractor yields the following:

"[1:Note:] See\n"
"      [2:TracRoadmap] for help on using\n"
"      the roadmap."

and

"[1:Note:] See\n"
"        [2:TracRoadmap] for help on using\n"
"        the roadmap."

The only difference is leading whitespace. I think we should make this collapse to a single whitespace, since we do not do anything useful with the whitespace anyway.

[jruigrok]

Chris noted that in a <pre> or xml:space="preserve" context we do requires the leading whitespace.

So the choice becomes making Genshi more selective on when to leave the whitespace in or to duplicate bits like this in the POT and PO files.

[cboos]

Not so important, can easily wait 0.6.x or 0.7.

[hodgestar]

Move to milestone 0.9.