fix XML comment syntax ("--" was not allowed in a comment)
fix XML comment syntax ("--" was not allowed in a comment)

svn path=/strategoxt/trunk/; revision=21479

lichtemo/strategoxt,lichtemo/strategoxt,metaborg/strategoxt,Apanatshka/strategoxt,lichtemo/strategoxt,Apanatshka/strategoxt,Apanatshka/strategoxt,lichtemo/strategoxt,metaborg/strategoxt,metaborg/strategoxt,lichtemo/strategoxt,metaborg/strategoxt,Apanatshka/strategoxt,metaborg/strategoxt,Apanatshka/strategoxt