git svn: avoid unnecessary '/' in paths for SVN

svn:// servers are more picky regarding redundant slashes
than file:// and http(s)://-backed respositories.  Since
the last commit, we avoid putting unnecessary slashes in
$GIT_CONFIG, but this doesn't help users who are already
set up that way.

Signed-off-by: Eric Wong <normalperson@yhbt.net>

git-svn.perl

@@ -2055,6 +2055,9 @@ sub new {
 		         "\":$ref_id\$\" in config\n";
 		($self->{path}, undef) = split(/\s*:\s*/, $fetch);
 	}
+	$self->{path} =~ s{/+}{/}g;
+	$self->{path} =~ s{\A/}{};
+	$self->{path} =~ s{/\z}{};
 	$self->{url} = command_oneline('config', '--get',
 	                               "svn-remote.$repo_id.url") or
                   die "Failed to read \"svn-remote.$repo_id.url\" in config\n";