fix docs formatting

docs/configuration.rst

@@ -188,10 +188,13 @@ Images and fonts are embedded following these rules :
   at all in Internet Explorer 8.
 - If asset path contains a directory named "**embed**".
 
+Overriding embedding settings
+-----------------------------
+
 You can override these rules using the following settings:
 
 ``PIPELINE_EMBED_MAX_IMAGE_SIZE``
-..........................
+.................................
 
   Setting that controls the maximum image size (in bytes) to embed in CSS using Data-URIs.
   Internet Explorer 8 has issues with assets under 32 kilobytes.
@@ -199,7 +202,7 @@ You can override these rules using the following settings:
   Defaults to ``32700``
   
 ``PIPELINE_EMBED_PATH``
-..........................
+.......................
 
   Setting the directory that an asset needs to be in so that it is embedded