prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  French IBAN should be 27 char of length
  * Faker version: 4.1.1
  
  ### Steps to reproduce
  
  ```
  import faker
  from faker import Faker
  fake = Faker('fr_FR')
  fr_iban = fake.iban()
  fr_iban
  'FR96505438725498141631455686'
  len(fr_iban)
  28
  ```
  
  
  ### Expected behavior
  
  ```
  >>> len(fr_iban)
  27
  ```
  
  [As stated on wikipedia in France row](https://en.wikipedia.org/wiki/International_Bank_Account_Number#IBAN_formats_by_country)
  
  ### Actual behavior
  
  ```
  >>> len(fr_iban)
  28
  ```
  
  
  </issue>
  <code>
  [start of faker/providers/bank/fr_FR/__init__.py]
  1 from .. import Provider as BankProvider
  2 
  3 
  4 class Provider(BankProvider):
  5     bban_format = '########################'
  6     country_code = 'FR'
  7
  [end of faker/providers/bank/fr_FR/__init__.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/faker/providers/bank/fr_FR/__init__.py b/faker/providers/bank/fr_FR/__init__.py
  --- a/faker/providers/bank/fr_FR/__init__.py
  +++ b/faker/providers/bank/fr_FR/__init__.py
  @@ -2,5 +2,5 @@
   
   
   class Provider(BankProvider):
  -    bban_format = '########################'
  +    bban_format = '#######################'
       country_code = 'FR'
  
verification_info: {"golden_diff": "diff --git a/faker/providers/bank/fr_FR/__init__.py b/faker/providers/bank/fr_FR/__init__.py\n--- a/faker/providers/bank/fr_FR/__init__.py\n+++ b/faker/providers/bank/fr_FR/__init__.py\n@@ -2,5 +2,5 @@\n \n \n class Provider(BankProvider):\n-    bban_format = '########################'\n+    bban_format = '#######################'\n     country_code = 'FR'\n", "issue": "French IBAN should be 27 char of length\n* Faker version: 4.1.1\r\n\r\n### Steps to reproduce\r\n\r\n```\r\nimport faker\r\nfrom faker import Faker\r\nfake = Faker('fr_FR')\r\nfr_iban = fake.iban()\r\nfr_iban\r\n'FR96505438725498141631455686'\r\nlen(fr_iban)\r\n28\r\n```\r\n\r\n\r\n### Expected behavior\r\n\r\n```\r\n>>> len(fr_iban)\r\n27\r\n```\r\n\r\n[As stated on wikipedia in France row](https://en.wikipedia.org/wiki/International_Bank_Account_Number#IBAN_formats_by_country)\r\n\r\n### Actual behavior\r\n\r\n```\r\n>>> len(fr_iban)\r\n28\r\n```\r\n\n", "before_files": [{"content": "from .. import Provider as BankProvider\n\n\nclass Provider(BankProvider):\n    bban_format = '########################'\n    country_code = 'FR'\n", "path": "faker/providers/bank/fr_FR/__init__.py"}]}