///foo[bar]///
///foo
[bar]///
///foo
b#{ar}baz///
///foo #bar
baz///

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

[
	["block-regex", [
        "///foo[bar]///"
    ]],
    ["block-regex", [
        "///foo\r\n[bar]///"
    ]],
    ["block-regex", [
        "///foo\r\nb",
        ["interpolation", "#{ar}"],
        "baz///"
    ]],
    ["block-regex", [
        "///foo ",
        ["comment", "#bar"],
        "\r\nbaz///"
    ]]
]

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

Checks for block regex.
Also checks for comments and interpolations inside block regex.