Make surrounding whitespace in centeredText the same style

Main.go

@@ -74,14 +74,20 @@ func monthHeight(m time.Month) int {
 func centeredText(s string, x, y, width int, scr tcell.Screen, style tcell.Style) {
 	start := x + max((width-utf8.RuneCountInString(s))/2, 0)
 	i := 0
+	for ; x+i < start; i++ {
+		scr.SetContent(x+i, y, ' ', nil, style)
+	}
 	for _, char := range s {
 		if i >= width {
 			break
 		}
 
-		scr.SetContent(start+i, y, char, nil, style)
+		scr.SetContent(x+i, y, char, nil, style)
 		i++
 	}
+	for ; x+i < start; i++ {
+		scr.SetContent(x+i, y, ' ', nil, style)
+	}
 }
 
 func wrappedText(s string, scr tcell.Screen, style tcell.Style) {