[newdak/master] Explain that `git commit -s` can add Signed-off-by lines.

[Adeodato Simó <dato@net.com.org.es>]

Signed-off-by: Adeodato Simó <dato@net.com.org.es>
---
 CodingStyle.txt |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/CodingStyle.txt b/CodingStyle.txt
index 2acf6f6..2c52f24 100644
--- a/CodingStyle.txt
+++ b/CodingStyle.txt
@@ -22,7 +22,8 @@ VCS related:
 
 - History rewriting is considered bad.
 
-- Always have a "Signed-off-by" line in your commit.
+- Always have a "Signed-off-by" line in your commit. `git commit -s`
+  automatically does it for you.
 
 - If you merge from others (fine), please use a seperate merge tree for
   it, which you setup in your .git/config similar to
-- 
1.5.6.3