Python counting is wrong with "" or ''

[geohot]

Describe the bug
Python parser gets stuck in string state if it sees '' or ""

To Reproduce

Create tmp.py with this content and run scc tmp.py

a = ''

# comment
for i in range(10):
  print(i)

Expected behavior

This is the (wrong) output

───────────────────────────────────────────────────────────────────────────────
Language                 Files     Lines   Blanks  Comments     Code Complexity
───────────────────────────────────────────────────────────────────────────────
Python                       1         6        0         0        6          0
───────────────────────────────────────────────────────────────────────────────
Total                        1         6        0         0        6          0
───────────────────────────────────────────────────────────────────────────────

You get this if you change '' to str()

───────────────────────────────────────────────────────────────────────────────
Language                 Files     Lines   Blanks  Comments     Code Complexity
───────────────────────────────────────────────────────────────────────────────
Python                       1         6        2         1        3          1
───────────────────────────────────────────────────────────────────────────────
Total                        1         6        2         1        3          1
───────────────────────────────────────────────────────────────────────────────

Desktop (please complete the following information):
Mac OS, tried version in brew and master

[boyter]

That's an interesting one!