prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Display the version number in the footer
  ![screen shot 2018-03-06 at 11 22 17](https://user-images.githubusercontent.com/1609292/37027086-a8dd8482-2130-11e8-8c72-939dae625a64.png)
  
  In the footer, next to "Available on github", we can display the version number from this file: https://github.com/kartoza/projecta/blob/develop/django_project/.version
  
  To be able to know between staging and production which version we are running
  
  Sentry is already reading this file: https://github.com/kartoza/projecta/blob/develop/django_project/core/settings/prod.py#L47
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `django_project/lesson/templatetags/lesson_tags.py`
  Content:
  ```
  1 # coding=utf-8
  2 """Custom tags for lesson app."""
  3 
  4 from django import template
  5 from django.utils.safestring import mark_safe
  6 
  7 register = template.Library()
  8 
  9 
  10 @register.filter(name='is_translation_up_to_date')
  11 def is_translation_up_to_date(value):
  12     if not value.is_translation_up_to_date:
  13         return mark_safe(
  14             '<span title="Translation is outdated"><sup>&#x2757;</sup></span>')
  15     else:
  16         return mark_safe('')
  17
  ```
  --- 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()
  
  ```
  
golden_diff: diff --git a/django_project/lesson/templatetags/lesson_tags.py b/django_project/lesson/templatetags/lesson_tags.py
  --- a/django_project/lesson/templatetags/lesson_tags.py
  +++ b/django_project/lesson/templatetags/lesson_tags.py
  @@ -1,8 +1,9 @@
   # coding=utf-8
   """Custom tags for lesson app."""
  -
   from django import template
   from django.utils.safestring import mark_safe
  +from core.settings.utils import absolute_path
  +
   
   register = template.Library()
   
  @@ -14,3 +15,16 @@
               '<span title="Translation is outdated"><sup>&#x2757;</sup></span>')
       else:
           return mark_safe('')
  +
  +
  +@register.simple_tag(takes_context=True)
  +def version_tag(context):
  +    """Reads current project release from the .version file."""
  +    version_file = absolute_path('.version')
  +    try:
  +        with open(version_file, 'r') as file:
  +            version = file.read()
  +            context['version'] = version
  +    except IOError:
  +        context['version'] = 'Unknown'
  +    return context['version']
  
verification_info: {"golden_diff": "diff --git a/django_project/lesson/templatetags/lesson_tags.py b/django_project/lesson/templatetags/lesson_tags.py\n--- a/django_project/lesson/templatetags/lesson_tags.py\n+++ b/django_project/lesson/templatetags/lesson_tags.py\n@@ -1,8 +1,9 @@\n # coding=utf-8\n \"\"\"Custom tags for lesson app.\"\"\"\n-\n from django import template\n from django.utils.safestring import mark_safe\n+from core.settings.utils import absolute_path\n+\n \n register = template.Library()\n \n@@ -14,3 +15,16 @@\n             '<span title=\"Translation is outdated\"><sup>&#x2757;</sup></span>')\n     else:\n         return mark_safe('')\n+\n+\n+@register.simple_tag(takes_context=True)\n+def version_tag(context):\n+    \"\"\"Reads current project release from the .version file.\"\"\"\n+    version_file = absolute_path('.version')\n+    try:\n+        with open(version_file, 'r') as file:\n+            version = file.read()\n+            context['version'] = version\n+    except IOError:\n+        context['version'] = 'Unknown'\n+    return context['version']\n", "issue": "Display the version number in the footer\n![screen shot 2018-03-06 at 11 22 17](https://user-images.githubusercontent.com/1609292/37027086-a8dd8482-2130-11e8-8c72-939dae625a64.png)\r\n\r\nIn the footer, next to \"Available on github\", we can display the version number from this file: https://github.com/kartoza/projecta/blob/develop/django_project/.version\r\n\r\nTo be able to know between staging and production which version we are running\r\n\r\nSentry is already reading this file: https://github.com/kartoza/projecta/blob/develop/django_project/core/settings/prod.py#L47\n", "before_files": [{"content": "# coding=utf-8\n\"\"\"Custom tags for lesson app.\"\"\"\n\nfrom django import template\nfrom django.utils.safestring import mark_safe\n\nregister = template.Library()\n\n\n@register.filter(name='is_translation_up_to_date')\ndef is_translation_up_to_date(value):\n    if not value.is_translation_up_to_date:\n        return mark_safe(\n            '<span title=\"Translation is outdated\"><sup>&#x2757;</sup></span>')\n    else:\n        return mark_safe('')\n", "path": "django_project/lesson/templatetags/lesson_tags.py"}], "after_files": [{"content": "# coding=utf-8\n\"\"\"Custom tags for lesson app.\"\"\"\nfrom django import template\nfrom django.utils.safestring import mark_safe\nfrom core.settings.utils import absolute_path\n\n\nregister = template.Library()\n\n\n@register.filter(name='is_translation_up_to_date')\ndef is_translation_up_to_date(value):\n    if not value.is_translation_up_to_date:\n        return mark_safe(\n            '<span title=\"Translation is outdated\"><sup>&#x2757;</sup></span>')\n    else:\n        return mark_safe('')\n\n\n@register.simple_tag(takes_context=True)\ndef version_tag(context):\n    \"\"\"Reads current project release from the .version file.\"\"\"\n    version_file = absolute_path('.version')\n    try:\n        with open(version_file, 'r') as file:\n            version = file.read()\n            context['version'] = version\n    except IOError:\n        context['version'] = 'Unknown'\n    return context['version']\n", "path": "django_project/lesson/templatetags/lesson_tags.py"}]}