style: make borders coherent (looks better with lots of proposals)

formatter/gnuplot_merit.go

@@ -122,7 +122,7 @@ unset mouse
 #set style fill solid border -1
 
 nb_grades = ` + strconv.Itoa(len(grades)) + `
-box_width = 0.9
+box_width = 1.0
 #array colors = ['#e63333', '#fa850a', '#e0b800', '#99c21f', '#48a948', '#338033']
 array colors = [` + hexPalette + `]
 
@@ -138,6 +138,9 @@ plot for [col=2: nb_grades + 1] \
     title columnhead(col) \
 	lw 5 \
     lt rgb colors[col-1]
+
+
+
 `
 	return gnuplotScript, nil
 }