This test checks leaders with leader-pattern="use-content"
x
Content 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 font
Content is svg 10 x 10
Content is svg 20 x 10 which is wider than the leader-length
Content is " "