[PATCH] Change the signature start string to "-- \n"

Change the signature start string from "--\n" to "-- \n" in the cover
mail template, as recommended in Mutt's manual:

    It is *strongly* recommended that you not unset this variable
    [from its default value of "-- \n"] unless your "signature"
    contains just your name. The reason for this is because many
    software packages use "-- \n" to detect your signature. For
    example, Mutt has the ability to highlight the signature in a
    different color in the builtin pager.

Signed-off-by: Karl Hasselström <redacted>

---

 templates/covermail.tmpl |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/templates/covermail.tmpl b/templates/covermail.tmpl
index 9789c9c..44cd19e 100644
--- a/templates/covermail.tmpl
+++ b/templates/covermail.tmpl

@@ -4,5 +4,5 @@ Date: %(date)s
 %(endofheaders)s
 The following series implements...
 
---
+-- 
 Signature