[PATCH] git-branch.txt: document -f correctly

[Michael J Gruber <git@drmicha.warpmail.net>]

'git branch -f a b' resets a to b when a exists, rather then deleting a.
Say so in the documentation.

Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net>
---
Something like this?

BTW, I noticed that 'git-subcmd' is used everywhere in here which does
not feel right, but I followed the existing style, leaving a consistent
clean-up for a later patch. Also, typesetting is inconsistent:
We have <branch> as well as `<branch>` when the text talks about the
options. Do we have a style guide or such?

 Documentation/git-branch.txt |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/git-branch.txt b/Documentation/git-branch.txt
index 6103d62..27b73bc 100644
--- a/Documentation/git-branch.txt
+++ b/Documentation/git-branch.txt
@@ -76,8 +76,8 @@ OPTIONS
 	based sha1 expressions such as "<branchname>@\{yesterday}".
 
 -f::
-	Force the creation of a new branch even if it means deleting
-	a branch that already exists with the same name.
+	Reset <branchname> to <startpoint> if <branchname> exists
+	already. Without `-f` 'git-branch' refuses to change an existing branch.
 
 -m::
 	Move/rename a branch and the corresponding reflog.
-- 
1.6.2.149.g6462