Fix docs build errors

Fix shocco errors during docs generation

Closes-Bug: 1362691
Change-Id: I2b7fb008c89f0b4e7280b2d0a054320765e83e47
diff --git a/lib/neutron_plugins/oneconvergence b/lib/neutron_plugins/oneconvergence
index e5f0d71..4fd8c7c 100644
--- a/lib/neutron_plugins/oneconvergence
+++ b/lib/neutron_plugins/oneconvergence
@@ -1,5 +1,6 @@
 # Neutron One Convergence plugin
-# ---------------------------
+# ------------------------------
+
 # Save trace setting
 OC_XTRACE=$(set +o | grep xtrace)
 set +o xtrace