---input---
"""This is a single line docstring."""
'''This also is a single line docstring.'''
"""Multiline
docstring
"""
'''Multiline
single
quote
docstring
'''

---tokens---
'"""This is a single line docstring."""' Literal.String.Doc
'\n'          Text.Whitespace

"'''This also is a single line docstring.'''" Literal.String.Doc
'\n'          Text.Whitespace

'"""Multiline\ndocstring\n"""' Literal.String.Doc
'\n'          Text.Whitespace

"'''Multiline\nsingle\nquote\ndocstring\n'''" Literal.String.Doc
'\n'          Text.Whitespace