Replaced many smart_bytes by force_bytes

In all those occurrences, we didn't care about preserving the
lazy status of the strings, but we really wanted to obtain a
real bytestring.

docs/ref/models/instances.txt

@@ -459,9 +459,9 @@ using ``__str__()`` like this::
         last_name = models.CharField(max_length=50)
 
         def __str__(self):
-            # Note use of django.utils.encoding.smart_bytes() here because
+            # Note use of django.utils.encoding.force_bytes() here because
             # first_name and last_name will be unicode strings.
-            return smart_bytes('%s %s' % (self.first_name, self.last_name))
+            return force_bytes('%s %s' % (self.first_name, self.last_name))
 
 ``get_absolute_url``
 --------------------

docs/ref/settings.txt

@@ -183,7 +183,7 @@ compose a prefix, version and key into a final cache key. The default
 implementation is equivalent to the function::
 
     def make_key(key, key_prefix, version):
-        return ':'.join([key_prefix, str(version), smart_bytes(key)])
+        return ':'.join([key_prefix, str(version), key])
 
 You may use any key function you want, as long as it has the same
 argument signature.

docs/releases/1.5.txt

@@ -227,7 +227,7 @@ If you have written a :ref:`custom password hasher <auth_password_storage>`,
 your ``encode()``, ``verify()`` or ``safe_summary()`` methods should accept
 Unicode parameters (``password``, ``salt`` or ``encoded``). If any of the
 hashing methods need byte strings, you can use the
-:func:`~django.utils.encoding.smart_bytes` utility to encode the strings.
+:func:`~django.utils.encoding.force_bytes` utility to encode the strings.
 
 Validation of previous_page_number and next_page_number
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

docs/topics/cache.txt

@@ -864,7 +864,7 @@ key version to provide a final cache key. By default, the three parts
 are joined using colons to produce a final string::
 
     def make_key(key, key_prefix, version):
-        return ':'.join([key_prefix, str(version), smart_bytes(key)])
+        return ':'.join([key_prefix, str(version), key])
 
 If you want to combine the parts in different ways, or apply other
 processing to the final key (e.g., taking a hash digest of the key