Log Message:
Update yelp-xsl to 3.16.1

3.16.1
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* Fixed Mallard link content when it's only an image
* Make sure TTML spans are displayed inline, #746550

3.16.0
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* Stable release

3.15.92
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* Removed indenting of subsections
* Added support for Mallard th element
* Updated translations:
  bs    (Samir Ribic)
  tr    (Muhammet Kara)
  vi    (Tran Ngoc Quan)