SubmittingPatches: note on whitespaces

Signed-off-by: NJunio C Hamano <junkio@cox.net>

Documentation/SubmittingPatches

@@ -4,8 +4,8 @@ it for the core GIT to make sure people understand what they are
 doing when they write "Signed-off-by" line.
 
 But the patch submission requirements are a lot more relaxed
-here, because the core GIT is thousand times smaller ;-).  So
-here is only the relevant bits.
+here on the technical/contents front, because the core GIT is
+thousand times smaller ;-).  So here is only the relevant bits.
 
 
 (1) Make separate commits for logically separate changes.
@@ -18,13 +18,19 @@ repository.  It is a good discipline.
 
 Describe the technical detail of the change(s).
 
-If your description starts to get long, that's a sign that you
+If your description starts to get too long, that's a sign that you
 probably need to split up your commit to finer grained pieces.
 
+Oh, another thing.  I am picky about whitespaces.  Make sure your
+changes do not trigger errors with the sample pre-commit hook shipped
+in templates/hooks--pre-commit.
 
-(2) Generate your patch using git/cogito out of your commits.
 
-git diff tools generate unidiff which is the preferred format.
+(2) Generate your patch using git tools out of your commits.
+
+git based diff tools (git, Cogito, and StGIT included) generate
+unidiff which is the preferred format.
+
 You do not have to be afraid to use -M option to "git diff" or
 "git format-patch", if your patch involves file renames.  The
 receiving end can handle them just fine.
@@ -33,20 +39,22 @@ Please make sure your patch does not include any extra files
 which do not belong in a patch submission.  Make sure to review
 your patch after generating it, to ensure accuracy.  Before
 sending out, please make sure it cleanly applies to the "master"
-branch head.
+branch head.  If you are preparing a work based on "next" branch,
+that is fine, but please mark it as such.
 
 
 (3) Sending your patches.
 
-People on the git mailing list needs to be able to read and
+People on the git mailing list need to be able to read and
 comment on the changes you are submitting.  It is important for
 a developer to be able to "quote" your changes, using standard
 e-mail tools, so that they may comment on specific portions of
-your code.  For this reason, all patches should be submitting
-e-mail "inline".  WARNING: Be wary of your MUAs word-wrap
-corrupting your patch.  Do not cut-n-paste your patch.
+your code.  For this reason, all patches should be submited
+"inline".  WARNING: Be wary of your MUAs word-wrap
+corrupting your patch.  Do not cut-n-paste your patch; you can
+lose tabs that way if you are not careful.
 
-It is common convention to prefix your subject line with
+It is a common convention to prefix your subject line with
 [PATCH].  This lets people easily distinguish patches from other
 e-mail discussions.