""
''
"foo ""bar"" baz"
'foo ''bar'' baz'
ITALICS_'foobar'
"foo &
&bar"
"foo &
! Comment
&bar"
----------------------------------------------------
[
["string", ["\"\""]],
["string", ["''"]],
["string", ["\"foo \"\"bar\"\" baz\""]],
["string", ["'foo ''bar'' baz'"]],
["string", ["ITALICS_'foobar'"]],
["string", ["\"foo &\r\n\t&bar\""]],
["string", [
"\"foo &\r\n\t",
["comment", "! Comment"],
"\r\n\t&bar\""
]]
]
----------------------------------------------------
Checks for strings and line continuation.
Also checks for comments inside strings.
