This test checks leaders with leader-pattern="use-content"
xContent is "x"=>Content is "=>" with background~Content is "~" with leader-pattern-width="12pt"*Content is "*" with leader-pattern-width="12pt" and border++Content is "++" with l-p-w="12pt" and border small fontContent is svg 10 x 10Content is svg 20 x 10 which is wider than the leader-lengthContent is " "