gbproxy-legacy: Ensure well-formed config file

Change-Id: I3495c8448459ba4f834744a1df6e7aa6a196d755
diff --git a/doc/examples/osmo-gbproxy/osmo-gbproxy-legacy.cfg b/doc/examples/osmo-gbproxy/osmo-gbproxy-legacy.cfg
index 15fd74a..c471c38 100644
--- a/doc/examples/osmo-gbproxy/osmo-gbproxy-legacy.cfg
+++ b/doc/examples/osmo-gbproxy/osmo-gbproxy-legacy.cfg
@@ -3,20 +3,20 @@
 !!
 !
 log stderr
-  logging filter all 1
-  logging color 1
-  logging timestamp 0
-  logging level all debug
-  logging level gprs debug
-  logging level ns info
-  logging level bssgp debug
-  logging level lglobal notice
-  logging level llapd notice
-  logging level linp notice
-  logging level lmux notice
-  logging level lmi notice
-  logging level lmib notice
-  logging level lsms notice
+ logging filter all 1
+ logging color 1
+ logging timestamp 0
+ logging level all debug
+ logging level gprs debug
+ logging level ns info
+ logging level bssgp debug
+ logging level lglobal notice
+ logging level llapd notice
+ logging level linp notice
+ logging level lmux notice
+ logging level lmi notice
+ logging level lmib notice
+ logging level lsms notice
 !
 line vty
  no login