When rendering <math> formulas inserted via \textstyle, e.g. <math>\textstyle \vec V</math>, too much line spacing is created. This issue seems to occur in SVG and PNG rendering.
How it should look:
Article in images is https://de.wikipedia.org/wiki/Gradient_(Mathematik)#Definition_2
This ticket is tagged as Need-volunteer to be tackled during the Wikimania Hackathon 2017.