[wp-trac] [WordPress Trac] #29171: empty (and valid) span tags are removed when switching from visual to text editor and back to visual

[WordPress Trac]

#29171: empty (and valid) span tags are removed when switching from visual to text
editor and back to visual
--------------------------+-----------------------------
 Reporter:  ruud@…        |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  TinyMCE       |    Version:  trunk
 Severity:  normal        |   Keywords:
  Focuses:                |
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 Forwarded from #28940, related #27391.

 The difference with #27391 is that when I tried to use a Bootstrap 3
 Glyphicon approach while having the 28940.patch installed the editor
 removes the (empty) span tag. The span tag doesn't use any new schema type
 of attribute, just a regular class.

 (see http://getbootstrap.com/components/ Glyphicons, How to use for
 testing)

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Ticket URL: <https://core.trac.wordpress.org/ticket/29171>
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