''
'foo'
'foo\'bar'
``
`foo`
`foo\`bar`

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

[
	["string", "''"],
	["string", "'foo'"],
	["string", "'foo\\'bar'"],
	["string", "``"],
	["string", "`foo`"],
	["string", "`foo\\`bar`"]
]

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

Checks for strings.