docs: Resolve issues with 'covers'

Two issues to correct:

- Each header in the 'headers' field can be either a string or a list
  value.
- We state that the 'content' field will always have content but our
  tests were configuring otherwise.

Signed-off-by: Stephen Finucane <stephen@that.guru>

1 files changed, 1 insertions, 1 deletions

diff --git a/patchwork/tests/utils.py b/patchwork/tests/utils.py
index 7759c8f..1a7baa2 100644
--- a/patchwork/tests/utils.py
+++ b/patchwork/tests/utils.py
@@ -228,7 +228,7 @@ def create_cover(**kwargs):
         'msgid': make_msgid(),
         'name': 'testpatch%d' % num,
         'headers': '',
-        'content': '',
+        'content': 'foo',
     }
     values.update(kwargs)