mmultiscripts processing discards content

[gimsieke]

Input:

<mml:mmultiscripts>
  <mml:mi>K</mml:mi>
  <mml:mrow/>
  <mml:mrow/>
  <mml:mprescripts/>
  <mml:mtext>Req</mml:mtext>
  <mml:mrow/>
</mml:mmultiscripts>

Current output:

{}^{}_{}{}{K}^{}_{}

Target output (using katexify.xsl):

{}^{}_{\htmlClass{override-text}{\text{Req}}}{}{K}^{}_{}

I propose that instead of:

<xsl:variable name="pre"  select=".//(*:mn|*:mrow)[preceding-sibling::*:mprescripts]"/>
<xsl:variable name="post" select=".//(*:mn|*:mrow)[following-sibling::*:mprescripts] except $base"/>

we use:

<xsl:variable name="pre"  select="*[preceding-sibling::*:mprescripts]"/>
<xsl:variable name="post" select="*[following-sibling::*:mprescripts] except $base"/>

[mkraetke]

This code was committed by @pmarkwart in 301d5ab. If he agrees with this change, you can commit this and we check the test results.

[pmarkwart]

Dew it!