[PATCH] Mention "local convention" rule in the CodingGuidelines

[Nanako Shiraishi <nanako3@lavabit.com>]

The document suggests to imitate the existing code, but didn't
say which existing code it should imitate. This clarifies.

Signed-off-by: しらいしななこ <nanako3@lavabit.com>
---
Quoting Junio C Hamano <gitster@pobox.com>:

> It is always preferable to match the _local_ convention.  I'd expect a new
> script added to git suite to match my preference (the one I showed you in
> my comments to you that is used in git-am, which is what you suggested
> above), but I'd expect a modification to mergetool to match the style
> mergetool already uses.

 Documentation/CodingGuidelines |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/Documentation/CodingGuidelines b/Documentation/CodingGuidelines
index f628c1f..664c6c2 100644
--- a/Documentation/CodingGuidelines
+++ b/Documentation/CodingGuidelines
@@ -21,8 +21,13 @@ code.  For git in general, three rough rules are:
 
 As for more concrete guidelines, just imitate the existing code
 (this is a good guideline, no matter which project you are
-contributing to).  But if you must have a list of rules,
-here they are.
+contributing to). It is always preferable to match the _local_
+convention. A new code added to git suite is expected to match
+the overall style of existing code. A modification to an existing
+code is expected to match the style the surrounding code already
+uses (even if it doesn't match the overall style of existing code).
+
+But if you must have a list of rules, here they are.
 
 For shell scripts specifically (not exhaustive):
 
-- 
Nanako Shiraishi
http://ivory.ap.teacup.com/nanako3/