Fixed billion vs. million bug in docs/model-api.txt. Thanks, Armin

git-svn-id: http://code.djangoproject.com/svn/django/trunk@1926 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/model-api.txt

@@ -361,7 +361,8 @@ Here are all available field types:
 
         meta.FloatField(..., max_digits=5, decimal_places=2)
 
-    And to store numbers up to one million with a resolution of 10 decimal places::
+    And to store numbers up to approximately one billion with a resolution of 10
+    decimal places::
 
         meta.FloatField(..., max_digits=19, decimal_places=10)