We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Fake ISBN10 causes "Registrant/Publication not found"
In rare cases the `fake.isbn10` method throws an exception with the following message: `Exception: Registrant/Publication not found in registrant rule list. `

A full exception message:
```
/usr/local/lib/python3.6/site-packages/faker/providers/isbn/__init__.py:70: in isbn10
    ean, group, registrant, publication = self._body()
/usr/local/lib/python3.6/site-packages/faker/providers/isbn/__init__.py:41: in _body
    registrant, publication = self._registrant_publication(reg_pub, rules)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
reg_pub = '64799998'
rules = [RegistrantRule(min='0000000', max='1999999', registrant_length=2), RegistrantRule(min='2000000', max='2279999', regis...'6480000', max='6489999', registrant_length=7), RegistrantRule(min='6490000', max='6999999', registrant_length=3), ...]

    @staticmethod
    def _registrant_publication(reg_pub, rules):
        """ Separate the registration from the publication in a given
            string.
            :param reg_pub: A string of digits representing a registration
                and publication.
            :param rules: A list of RegistrantRules which designate where
                to separate the values in the string.
            :returns: A (registrant, publication) tuple of strings.
            """
        for rule in rules:
            if rule.min <= reg_pub <= rule.max:
                reg_len = rule.registrant_length
                break
        else:
>           raise Exception('Registrant/Publication not found in registrant '
                            'rule list.')
E           Exception: Registrant/Publication not found in registrant rule list.

/usr/local/lib/python3.6/site-packages/faker/providers/isbn/__init__.py:59: Exception
```
### Steps to reproduce

Call `faker.providers.isbn.Provider._registrant_publication` with any of the following values for the `reg_pub` param: `64799998`, `39999999`. These values are valid randomly generated strings from [L34](https://github.com/joke2k/faker/blob/master/faker/providers/isbn/__init__.py#L37).

Code:
```python
from faker.providers.isbn import Provider
from faker.providers.isbn.rules import RULES

# Fails; throws an exception
Provider._registrant_publication('64799998', RULES['978']['0'])
Provider._registrant_publication('39999999', RULES['978']['1'])

# Works; but may be invalid
Provider._registrant_publication('64799998', RULES['978']['1'])
Provider._registrant_publication('39999999', RULES['978']['0'])
```

### Expected behavior

The `faker.providers.isbn.Provider._body` should generate valid `reg_pub` values.

### Actual behavior

It generates values for `reg_pub` that are not accepted by the rules defined in `faker.providers.isbn.rules`.


--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `faker/providers/isbn/__init__.py`
Content:
```
1 # coding=utf-8
2 
3 from __future__ import unicode_literals
4 from .. import BaseProvider
5 from .isbn import ISBN, ISBN10, ISBN13
6 from .rules import RULES
7 
8 
9 class Provider(BaseProvider):
10     """ Generates fake ISBNs. ISBN rules vary across languages/regions
11     so this class makes no attempt at replicating all of the rules. It
12     only replicates the 978 EAN prefix for the English registration
13     groups, meaning the first 4 digits of the ISBN-13 will either be
14     978-0 or 978-1. Since we are only replicating 978 prefixes, every
15     ISBN-13 will have a direct mapping to an ISBN-10.
16 
17     See https://www.isbn-international.org/content/what-isbn for the
18     format of ISBNs.
19     See https://www.isbn-international.org/range_file_generation for the
20     list of rules pertaining to each prefix/registration group.
21     """
22 
23     def _body(self):
24         """ Generate the information required to create an ISBN-10 or
25         ISBN-13.
26         """
27         ean = self.random_element(RULES.keys())
28         reg_group = self.random_element(RULES[ean].keys())
29 
30         # Given the chosen ean/group, decide how long the
31         #   registrant/publication string may be.
32         # We must allocate for the calculated check digit, so
33         #   subtract 1
34         reg_pub_len = ISBN.MAX_LENGTH - len(ean) - len(reg_group) - 1
35 
36         # Generate a registrant/publication combination
37         reg_pub = self.numerify('#' * reg_pub_len)
38 
39         # Use rules to separate the registrant from the publication
40         rules = RULES[ean][reg_group]
41         registrant, publication = self._registrant_publication(reg_pub, rules)
42         return [ean, reg_group, registrant, publication]
43 
44     @staticmethod
45     def _registrant_publication(reg_pub, rules):
46         """ Separate the registration from the publication in a given
47         string.
48         :param reg_pub: A string of digits representing a registration
49             and publication.
50         :param rules: A list of RegistrantRules which designate where
51             to separate the values in the string.
52         :returns: A (registrant, publication) tuple of strings.
53         """
54         for rule in rules:
55             if rule.min <= reg_pub <= rule.max:
56                 reg_len = rule.registrant_length
57                 break
58         else:
59             raise Exception('Registrant/Publication not found in registrant '
60                             'rule list.')
61         registrant, publication = reg_pub[:reg_len], reg_pub[reg_len:]
62         return registrant, publication
63 
64     def isbn13(self, separator='-'):
65         ean, group, registrant, publication = self._body()
66         isbn = ISBN13(ean, group, registrant, publication)
67         return isbn.format(separator)
68 
69     def isbn10(self, separator='-'):
70         ean, group, registrant, publication = self._body()
71         isbn = ISBN10(ean, group, registrant, publication)
72         return isbn.format(separator)
73
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/faker/providers/isbn/__init__.py b/faker/providers/isbn/__init__.py
--- a/faker/providers/isbn/__init__.py
+++ b/faker/providers/isbn/__init__.py
@@ -52,7 +52,7 @@
         :returns: A (registrant, publication) tuple of strings.
         """
         for rule in rules:
-            if rule.min <= reg_pub <= rule.max:
+            if rule.min <= reg_pub[:-1] <= rule.max:
                 reg_len = rule.registrant_length
                 break
         else:

{"golden_diff": "diff --git a/faker/providers/isbn/__init__.py b/faker/providers/isbn/__init__.py\n--- a/faker/providers/isbn/__init__.py\n+++ b/faker/providers/isbn/__init__.py\n@@ -52,7 +52,7 @@\n         :returns: A (registrant, publication) tuple of strings.\n         \"\"\"\n         for rule in rules:\n-            if rule.min <= reg_pub <= rule.max:\n+            if rule.min <= reg_pub[:-1] <= rule.max:\n                 reg_len = rule.registrant_length\n                 break\n         else:\n", "issue": "Fake ISBN10 causes \"Registrant/Publication not found\"\nIn rare cases the `fake.isbn10` method throws an exception with the following message: `Exception: Registrant/Publication not found in registrant rule list. `\r\n\r\nA full exception message:\r\n```\r\n/usr/local/lib/python3.6/site-packages/faker/providers/isbn/__init__.py:70: in isbn10\r\n    ean, group, registrant, publication = self._body()\r\n/usr/local/lib/python3.6/site-packages/faker/providers/isbn/__init__.py:41: in _body\r\n    registrant, publication = self._registrant_publication(reg_pub, rules)\r\n_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ \r\nreg_pub = '64799998'\r\nrules = [RegistrantRule(min='0000000', max='1999999', registrant_length=2), RegistrantRule(min='2000000', max='2279999', regis...'6480000', max='6489999', registrant_length=7), RegistrantRule(min='6490000', max='6999999', registrant_length=3), ...]\r\n\r\n    @staticmethod\r\n    def _registrant_publication(reg_pub, rules):\r\n        \"\"\" Separate the registration from the publication in a given\r\n            string.\r\n            :param reg_pub: A string of digits representing a registration\r\n                and publication.\r\n            :param rules: A list of RegistrantRules which designate where\r\n                to separate the values in the string.\r\n            :returns: A (registrant, publication) tuple of strings.\r\n            \"\"\"\r\n        for rule in rules:\r\n            if rule.min <= reg_pub <= rule.max:\r\n                reg_len = rule.registrant_length\r\n                break\r\n        else:\r\n>           raise Exception('Registrant/Publication not found in registrant '\r\n                            'rule list.')\r\nE           Exception: Registrant/Publication not found in registrant rule list.\r\n\r\n/usr/local/lib/python3.6/site-packages/faker/providers/isbn/__init__.py:59: Exception\r\n```\r\n### Steps to reproduce\r\n\r\nCall `faker.providers.isbn.Provider._registrant_publication` with any of the following values for the `reg_pub` param: `64799998`, `39999999`. These values are valid randomly generated strings from [L34](https://github.com/joke2k/faker/blob/master/faker/providers/isbn/__init__.py#L37).\r\n\r\nCode:\r\n```python\r\nfrom faker.providers.isbn import Provider\r\nfrom faker.providers.isbn.rules import RULES\r\n\r\n# Fails; throws an exception\r\nProvider._registrant_publication('64799998', RULES['978']['0'])\r\nProvider._registrant_publication('39999999', RULES['978']['1'])\r\n\r\n# Works; but may be invalid\r\nProvider._registrant_publication('64799998', RULES['978']['1'])\r\nProvider._registrant_publication('39999999', RULES['978']['0'])\r\n```\r\n\r\n### Expected behavior\r\n\r\nThe `faker.providers.isbn.Provider._body` should generate valid `reg_pub` values.\r\n\r\n### Actual behavior\r\n\r\nIt generates values for `reg_pub` that are not accepted by the rules defined in `faker.providers.isbn.rules`.\r\n\n", "before_files": [{"content": "# coding=utf-8\n\nfrom __future__ import unicode_literals\nfrom .. import BaseProvider\nfrom .isbn import ISBN, ISBN10, ISBN13\nfrom .rules import RULES\n\n\nclass Provider(BaseProvider):\n    \"\"\" Generates fake ISBNs. ISBN rules vary across languages/regions\n    so this class makes no attempt at replicating all of the rules. It\n    only replicates the 978 EAN prefix for the English registration\n    groups, meaning the first 4 digits of the ISBN-13 will either be\n    978-0 or 978-1. Since we are only replicating 978 prefixes, every\n    ISBN-13 will have a direct mapping to an ISBN-10.\n\n    See https://www.isbn-international.org/content/what-isbn for the\n    format of ISBNs.\n    See https://www.isbn-international.org/range_file_generation for the\n    list of rules pertaining to each prefix/registration group.\n    \"\"\"\n\n    def _body(self):\n        \"\"\" Generate the information required to create an ISBN-10 or\n        ISBN-13.\n        \"\"\"\n        ean = self.random_element(RULES.keys())\n        reg_group = self.random_element(RULES[ean].keys())\n\n        # Given the chosen ean/group, decide how long the\n        #   registrant/publication string may be.\n        # We must allocate for the calculated check digit, so\n        #   subtract 1\n        reg_pub_len = ISBN.MAX_LENGTH - len(ean) - len(reg_group) - 1\n\n        # Generate a registrant/publication combination\n        reg_pub = self.numerify('#' * reg_pub_len)\n\n        # Use rules to separate the registrant from the publication\n        rules = RULES[ean][reg_group]\n        registrant, publication = self._registrant_publication(reg_pub, rules)\n        return [ean, reg_group, registrant, publication]\n\n    @staticmethod\n    def _registrant_publication(reg_pub, rules):\n        \"\"\" Separate the registration from the publication in a given\n        string.\n        :param reg_pub: A string of digits representing a registration\n            and publication.\n        :param rules: A list of RegistrantRules which designate where\n            to separate the values in the string.\n        :returns: A (registrant, publication) tuple of strings.\n        \"\"\"\n        for rule in rules:\n            if rule.min <= reg_pub <= rule.max:\n                reg_len = rule.registrant_length\n                break\n        else:\n            raise Exception('Registrant/Publication not found in registrant '\n                            'rule list.')\n        registrant, publication = reg_pub[:reg_len], reg_pub[reg_len:]\n        return registrant, publication\n\n    def isbn13(self, separator='-'):\n        ean, group, registrant, publication = self._body()\n        isbn = ISBN13(ean, group, registrant, publication)\n        return isbn.format(separator)\n\n    def isbn10(self, separator='-'):\n        ean, group, registrant, publication = self._body()\n        isbn = ISBN10(ean, group, registrant, publication)\n        return isbn.format(separator)\n", "path": "faker/providers/isbn/__init__.py"}], "after_files": [{"content": "# coding=utf-8\n\nfrom __future__ import unicode_literals\nfrom .. import BaseProvider\nfrom .isbn import ISBN, ISBN10, ISBN13\nfrom .rules import RULES\n\n\nclass Provider(BaseProvider):\n    \"\"\" Generates fake ISBNs. ISBN rules vary across languages/regions\n    so this class makes no attempt at replicating all of the rules. It\n    only replicates the 978 EAN prefix for the English registration\n    groups, meaning the first 4 digits of the ISBN-13 will either be\n    978-0 or 978-1. Since we are only replicating 978 prefixes, every\n    ISBN-13 will have a direct mapping to an ISBN-10.\n\n    See https://www.isbn-international.org/content/what-isbn for the\n    format of ISBNs.\n    See https://www.isbn-international.org/range_file_generation for the\n    list of rules pertaining to each prefix/registration group.\n    \"\"\"\n\n    def _body(self):\n        \"\"\" Generate the information required to create an ISBN-10 or\n        ISBN-13.\n        \"\"\"\n        ean = self.random_element(RULES.keys())\n        reg_group = self.random_element(RULES[ean].keys())\n\n        # Given the chosen ean/group, decide how long the\n        #   registrant/publication string may be.\n        # We must allocate for the calculated check digit, so\n        #   subtract 1\n        reg_pub_len = ISBN.MAX_LENGTH - len(ean) - len(reg_group) - 1\n\n        # Generate a registrant/publication combination\n        reg_pub = self.numerify('#' * reg_pub_len)\n\n        # Use rules to separate the registrant from the publication\n        rules = RULES[ean][reg_group]\n        registrant, publication = self._registrant_publication(reg_pub, rules)\n        return [ean, reg_group, registrant, publication]\n\n    @staticmethod\n    def _registrant_publication(reg_pub, rules):\n        \"\"\" Separate the registration from the publication in a given\n        string.\n        :param reg_pub: A string of digits representing a registration\n            and publication.\n        :param rules: A list of RegistrantRules which designate where\n            to separate the values in the string.\n        :returns: A (registrant, publication) tuple of strings.\n        \"\"\"\n        for rule in rules:\n            if rule.min <= reg_pub[:-1] <= rule.max:\n                reg_len = rule.registrant_length\n                break\n        else:\n            raise Exception('Registrant/Publication not found in registrant '\n                            'rule list.')\n        registrant, publication = reg_pub[:reg_len], reg_pub[reg_len:]\n        return registrant, publication\n\n    def isbn13(self, separator='-'):\n        ean, group, registrant, publication = self._body()\n        isbn = ISBN13(ean, group, registrant, publication)\n        return isbn.format(separator)\n\n    def isbn10(self, separator='-'):\n        ean, group, registrant, publication = self._body()\n        isbn = ISBN10(ean, group, registrant, publication)\n        return isbn.format(separator)\n", "path": "faker/providers/isbn/__init__.py"}]}