Foo

!!!!

""""

####

$$$$

%%%%

&&&&

''''

((((

))))

****

++++

,,,,

----

....

////

::::

;;;;

<<<<

====

>>>>

????

@@@@

[[[[

\\\\

]]]]

^^^^

____

````

{{{{

||||

}}}}

~~~~

Foo

----------------------------------------------------

[
	"Foo\r\n\r\n",
	["hr", "!!!!"],
	["hr", "\"\"\"\""],
	["hr", "####"],
	["hr", "$$$$"],
	["hr", "%%%%"],
	["hr", "&&&&"],
	["hr", "''''"],
	["hr", "(((("],
	["hr", "))))"],
	["hr", "****"],
	["hr", "++++"],
	["hr", ",,,,"],
	["hr", "----"],
	["hr", "...."],
	["hr", "////"],
	["hr", "::::"],
	["hr", ";;;;"],
	["hr", "<<<<"],
	["hr", "===="],
	["hr", ">>>>"],
	["hr", "????"],
	["hr", "@@@@"],
	["hr", "[[[["],
	["hr", "\\\\\\\\"],
	["hr", "]]]]"],
	["hr", "^^^^"],
	["hr", "____"],
	["hr", "````"],
	["hr", "{{{{"],
	["hr", "||||"],
	["hr", "}}}}"],
	["hr", "~~~~"],
	"\r\n\r\nFoo"
]

----------------------------------------------------

Checks for horizontal lines, with every possible characters.
The "Foo"s are required since tests are trimmed and horizontal lines
require line feeds before and after.