[NTG-context] [preventing blackrule tp break line]

Using lmtx, while trying to get multiple pieces of black rule on one line, for some reason the line breaks after the first item, to continue on the second line with the remainder. \starttext \blackrule[width=15mm,height=1mm,depth=0mm,color=yellow]\quad% \blackrule[width=15mm,height=1mm,depth=0mm,color=red]\quad% \blackrule[width=15mm,height=1mm,depth=0mm,color=green]\quad% \blackrule[width=15mm,height=1mm,depth=0mm,color=blue]\quad \blackrule[width=15mm,height=1mm,depth=0mm,color=yellow]\quad% \blackrule[width=15mm,height=1mm,depth=0mm,color=red]\quad% \blackrule[width=15mm,height=1mm,depth=0mm,color=green]\quad% \blackrule[width=15mm,height=1mm,depth=0mm,color=blue]\quad \stoptext What is the proper way to do it? .F