[1.8.x] Discouraged use of /tmp with predictable names.

The use of predictable filenames in /tmp often leads to symlink attacks
so remove the most obvious use of them in the docs.

Backport of 77b8d8cb6d6d6345f479c68c4892291c1492ba7e from master

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/ref/models/fields.txt b/docs/ref/models/fields.txt
index 51e4b0de18..74d721afc4 100644
--- a/docs/ref/models/fields.txt
+++ b/docs/ref/models/fields.txt
@@ -778,7 +778,7 @@ Python file object like this::
 
     from django.core.files import File
     # Open an existing file using Python's built-in open()
-    f = open('/tmp/hello.world')
+    f = open('/path/to/hello.world')
     myfile = File(f)
 
 Or you can construct one from a Python string like this::