From the source...

<xsl:template match="itemizedlist/listitem">
  <xsl:text>&#10;</xsl:text>
  <xsl:text>.sp</xsl:text>
  <xsl:text>&#10;</xsl:text>
  <xsl:text>.RS</xsl:text>
  <xsl:if test="not($list-indent = '')">
    <xsl:text> </xsl:text>
    <xsl:value-of select="$list-indent"/>
  </xsl:if>
  <xsl:text>&#10;</xsl:text>
  <!-- * if "n" then we are using "nroff", which means the output is for -->
  <!-- * TTY; so we do some fixed-width-font hackery with \h to make a -->
  <!-- * hanging indent (instead of using .IP, which has some -->
  <!-- * undesirable side effects under certain circumstances) -->
  <xsl:call-template name="roff-if-else-start"/>
  <xsl:text>\h'-</xsl:text>
  <xsl:choose>
    <xsl:when test="not($list-indent = '')">
      <xsl:text>0</xsl:text>
      <xsl:value-of select="$list-indent"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:text>\n(INu</xsl:text>
    </xsl:otherwise>
  </xsl:choose>
  <xsl:text>'</xsl:text>
  <xsl:text>&#x2022;</xsl:text>
  <xsl:text>\h'+</xsl:text>
  <xsl:choose>
    <xsl:when test="not($list-indent = '')">
      <xsl:text>0</xsl:text>
      <xsl:value-of select="$list-indent - 1"/>
    </xsl:when>
    <xsl:otherwise>
      <xsl:text>\n(INu-1</xsl:text>
    </xsl:otherwise>
  </xsl:choose>
  <xsl:text>'\c&#10;</xsl:text>
  <!-- * else, we are not using for "nroff", but instead "troff" - which -->
  <!-- * means not for TTY, but for PS or whatever; so we’re not using a -->
  <!-- * fixed-width font, so use a real .IP instead -->
  <xsl:call-template name="roff-else"/>
  <!-- * .IP generates a blank like of space, so let’s go backwards one -->
  <!-- * line up to compensate for that -->
  <xsl:text>.sp -1&#10;</xsl:text>
  <xsl:text>.IP \(bu 2.3&#10;</xsl:text>
  <!-- * The value 2.3 is the amount of indentation; we use 2.3 instead -->
  <!-- * of 2 because when the font family is New Century Schoolbook it -->
  <!-- * seems to require the extra space. -->
  <xsl:call-template name="roff-if-end"/>
  <xsl:apply-templates/>
  <xsl:text>.RE&#10;</xsl:text>
</xsl:template>

Illuminating, isn't it?

-- 
Anthony J. Bentley
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