doc: fix code block in grpc docs

The code block after the :: is not displayed correctly without an empty
line in between.

Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>

diff --git a/doc/developer/grpc.rst b/doc/developer/grpc.rst
index cb164bdabf19b47b776eb6977bf4dd8d1d20bfd5..4e81adf8b243a069bd7917b4fa9c44fd7b33b6a7 100644 (file)
--- a/doc/developer/grpc.rst
+++ b/doc/developer/grpc.rst
@@ -42,6 +42,7 @@ Generating C++ FRR Bindings
 Generating FRR northbound bindings for C++ example:
 
 ::
+
    # Install gRPC (e.g., on Ubuntu 20.04)
    sudo apt-get install libgrpc++-dev libgrpc-dev