When diffing, we want to have the simplest tree possible.  So merge all adjacent text nodes, which are created by the parse algorithm when it tries to determine where links start and end.
When diffing, we want to have the simplest tree possible.  So merge all
adjacent text nodes, which are created by the parse algorithm when it tries
to determine where links start and end.

kristapsdz/lowdown,kristapsdz/lowdown,kristapsdz/lowdown