Added $ delimiters around arrows (\to) in index markers to be compilable.

xsl/latex.xsl

		<xsl:with-param name="pText" select="@name" />
		<xsl:with-param name="pToken" select="','" />
		- <xsl:with-param name="pSubst" select="' \to '" />
		+ <xsl:with-param name="pSubst" select="' $\to$ '" />
		</xsl:call-template>
		<xsl:text>!</xsl:text>

Delta	1 line added, 1 line removed