Empty choose

An xsl:choose exists to pick among xsl:when branches, so one with no xsl:when is degenerate. XSLT requires at least one xsl:when, so a processor rejects it; and even read loosely, an xsl:choose holding only an xsl:otherwise is a wrapper that always runs its single branch — the xsl:choose adds nothing.

The check is report-only until the full-fidelity parser (#228). Both corrections — dropping the xsl:choose and keeping its xsl:otherwise content, or adding the missing xsl:when — rewrite element structure, which the fixer, editing one attribute or text span at a time, cannot express.

Incorrect:

<xsl:template match="/objects">
  <xsl:choose>
    <xsl:otherwise>
      <xsl:text>fallback</xsl:text>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>

Correct:

<xsl:template match="/objects">
  <xsl:text>fallback</xsl:text>
</xsl:template>