[PATCH] Simplify use of formatted_raw_ostream

[Duncan P. N. Exon Smith]

> On 2015-Apr-09, at 13:08, Chandler Carruth <chandlerc at gmail.com> wrote:
> 
> Seems much cleaner to me. LGTM provided others don't see a problem here.

LGTM too.

> 
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> http://reviews.llvm.org/D8935
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