Documentation: fix formatting in git-svn

Due to a misplaced list block separator, general hints about the config
file options got indented at the same level as the description of the last
option, making it easy to miss them.
Signed-off-by: NJan Krüger <jk@jk.gs>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Documentation/git-svn.txt

@@ -448,6 +448,8 @@ svn-remote.<name>.rewriteRoot::
 	the repository with a public http:// or svn:// URL in the
 	metadata so users of it will see the public URL.
 
+--
+
 Since the noMetadata, rewriteRoot, useSvnsyncProps and useSvmProps
 options all affect the metadata generated and used by git-svn; they
 *must* be set in the configuration file before any history is imported
@@ -456,7 +458,6 @@ and these settings should never be changed once they are set.
 Additionally, only one of these four options can be used per-svn-remote
 section because they affect the 'git-svn-id:' metadata line.
 
---
 
 BASIC EXAMPLES
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