Fixed comments in manual rtlil/ilang syntax

manual/manual.tex

@@ -109,8 +109,7 @@ bookmarksopen=false%
 }
 
 \lstdefinelanguage{rtlil}{
-	morecomment=[l]{//},
-	morecomment=[s]{/*}{*/},
+	morecomment=[l]{\#},
 	morekeywords={module,attribute,parameter,wire,memory,auto,width,offset,size,input,output,inout,cell,connect,switch,case,assign,sync,low,high,posedge,negedge,edge,always,update,process,end},
 	morestring=[b]",
 }