Fixed typo (lacking ';') which was triggering a 'not well-formed entity reference' error with docbook2texixml
Fixed typo (lacking ';') which was triggering a 'not well-formed entity reference' error with docbook2texixml

svn path=/trunk/; revision=2516

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot