doc/dev: Fix Sphinx complaints in msgr2.rst

Uncontroversial Sphinx fixes:

Fix Sphinx warning about section title underline too short.
No change in rendering.

Fix Sphinx critical about section title underline at wrong level.
Fixes the title rendering and makes it visible.

Signed-off-by: Ville Ojamo <14869000+bluikko@users.noreply.github.com>

diff --git a/doc/dev/msgr2.rst b/doc/dev/msgr2.rst
index 990ebf8f35c82382ceec1722b47d0bd7307495a7..130d3be92efa5f11ddd9cbcac5bacceb9533a5b1 100644 (file)
--- a/doc/dev/msgr2.rst
+++ b/doc/dev/msgr2.rst
@@ -595,7 +595,7 @@ Post-compression frame format
 Depending on the negotiated connection mode from TAG_COMPRESSION_DONE, the connection is able to accept/send compressed frames or process all frames as decompressed.
 
 msgr2.x-force mode
-~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~
 
 All subsequent frames that will be sent via the connection will be compressed if compression requirements are met (e.g, the frames size).
 
@@ -883,7 +883,7 @@ Once a session is established, we can exchange messages.
 
 
 Example of protocol interaction (WIP)
-_____________________________________
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 
 .. ditaa::