[Buildbot] #3476: HTML is not rendered as documented in Parametes labels

[Buildbot trac]

#3476: HTML is not rendered as documented in Parametes labels
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Reporter:  rutsky     |      Owner:
    Type:  undecided  |     Status:  new
Priority:  major      |  Milestone:  undecided
 Version:  0.9.0b7    |   Keywords:
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 Documentation [http://docs.buildbot.net/latest/developer/cls-
 forcesched.html?highlight=HTML#buildbot.schedulers.forceshed.BaseParameter.label
 says], that !ForceScheduler parameter's label field may have raw HTML,
 however this HTML is not rendered as HTML in web UI, but as raw string.

 For example, `<br>` is not rendered as line feed in example at the end of
 [http://docs.buildbot.net/latest/manual/cfg-schedulers.html
 #forcescheduler-scheduler this] chapter.

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Ticket URL: <http://trac.buildbot.net/ticket/3476>
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