Merge branch 'jn/hooks-pre-rebase-sample-fix' into maint

Code clean-up, that makes us in sync with Debian by one patch.

* jn/hooks-pre-rebase-sample-fix:
  pre-rebase hook: capture documentation in a <<here document

templates/hooks--pre-rebase.sample

@@ -88,9 +88,7 @@ else
 	exit 1
 fi
 
-exit 0
-
-################################################################
+<<\DOC_END
 
 This sample hook safeguards topic branches that have been
 published from being rewound.
@@ -167,3 +165,5 @@ To compute (2):
 	git rev-list master..topic
 
 	if this is empty, it is fully merged to "master".
+
+DOC_END