[PATCH] rebase: fix documentation formatting

Last sections are squashed into non-formatted block after adding
"REBASING MERGES".
To reproduce the error see bottom of page:
https://git-scm.com/docs/git-rebase

Signed-off-by: Vladimir Parfinenko <redacted>
---
 Documentation/git-rebase.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt
index bd5ecff98..6fe98165d 100644
--- a/Documentation/git-rebase.txt
+++ b/Documentation/git-rebase.txt

@@ -804,7 +804,7 @@ The ripple effect of a "hard case" recovery is

especially bad:
 case" recovery too!

 REBASING MERGES
------------------
+---------------

 The interactive rebase command was originally designed to handle
 individual patch series. As such, it makes sense to exclude merge
--
2.18.0.windows.1