mspace-01

You should see two lines of text below

W3C sample	WIRIS
	$$\begin{gathered} \text{First line} \\ \text{Second line} \end{gathered}$$

<math xmlns="http://www.w3.org/1998/Math/MathML" display="block">
  <mtext>First line</mtext>
  <mspace linebreak="newline"/>
  <mtext>Second line</mtext>
</math>

Author: George Chavchanidze, Opera Software ASA