News in 3.99.7, 2017-12-09
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* Rename gtk_source_completion_show() to gtk_source_completion_start().
* Drop gconstructor.h, add gtk_source_init() and gtk_source_finalize().
* Improve documentation.
* New syntax highlighting definition file for: logcat.
* Improvements to the syntax highlighting of: Python, reStructuredText and
  CMake.
* Improvements to the Visual Studio builds.
* Translation updates.

News in 3.99.6, 2017-10-15
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