XSL:FO avoid Space between Table Cells - xslt-2.0

Question

Hello guy I have two table Cells and a <fo:leader/> in both Cells. How can i avoid to get a space between the two Cells. It's not possible to span the two cells.
I use Antennahouse and XSLT 2.0 .
Here is my Code for the table
<fo:table width="100%" >
<fo:table-column column-width="50%"/>
<fo:table-column column-width="50%"/>
<fo:table-body >
<fo:table-row>
<fo:table-cell >
<fo:block border-right-width="0.0mm" >
<xsl:if test="page">
<xsl:attribute name="text-align-last">justify</xsl:attribute>
</xsl:if>
<xsl:value-of select="concat(#ref1,' ')"/>
<xsl:if test="page">
<fo:leader leader-pattern="dots"/>
</xsl:if>
</fo:block>
</fo:table-cell>
<fo:table-cell >
<fo:block text-align="justify" text-align-last="right" axf:text-align-first="justify">
<xsl:if test="page">
<fo:leader leader-pattern="dots" />
</xsl:if>
<fo:inline><xsl:apply-templates select="page" mode="normal"><xsl:with-param name="chapter" select="#chapterNumber"></xsl:with-param></xsl:apply-templates></fo:inline></fo:block>
</fo:table-cell>
</fo:table-row>

Answer 1

Without all the other stuff you have, with pure XSL FO and no extensions this works for me:
<fo:table width="100%" >
<fo:table-column column-width="50%"/>
<fo:table-column column-width="50%"/>
<fo:table-body >
<fo:table-row>
<fo:table-cell>
<fo:block text-align-last="justify">
<fo:inline>Stuff</fo:inline>
<fo:leader leader-pattern="dots"/>
</fo:block>
</fo:table-cell>
<fo:table-cell>
<fo:block text-align-last="justify">
<fo:leader leader-pattern="dots" />
<fo:inline>1</fo:inline></fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
No spaces.
In response to the question, is it possible I got lucky? Tested again, various content and table column widths. Content that I am showing likely is kerned and of various lengths and I varied the size of the table cells. In all cases there is no gap.
I tested a few others things and realize the difference is the formatter. Apache FOP and Antennahouse yield the issue you have shown, I was using RenderX XEP (whom I work for). It does not exhibit this behavior. IMHO, the correct answer is no spaces if your formatter has the algorithms for allowing inter-character and word space squeezing to fit within an allowable tolerance. Justified is "justified".

Answer 2

I think there are two reasons for the strange "gap" between the two series of dots on each table row:
the column is not an exact multiple of the leader pattern (dot + space); for example, supposing a dot and a space are 3 mm wide and the empty area to be filled by the fo:leader has a width of 17 mm, the formatter can only insert 5 dots, leaving an extra gap of 2 mm
the dots on different rows are not aligned; each series of dots in the left column starts rigth from the end of the preceding text, so the gap depends also on the text length
Solution:
use leader-alignment="reference-area" (which XSLFormatter supports)
set a leader-pattern-width, and set the table width to a multiple of that