diff --git a/doc/libraries.md b/doc/libraries.md
index 6bee7d882..98d199f7e 100644
--- a/doc/libraries.md
+++ b/doc/libraries.md
@@ -184,6 +184,7 @@ modifications to the spdk source directly.
 Any environment can replace the `spdk_env_dpdk` environment by implementing the `include/env.h` header
 file. The environment can either be implemented wholesale in a single library or as a two-part
 shim/implementation library system.
+
 ~~~{.sh}
 	# single library
 	gcc -o my_app ./my_app.c -lspdk -lcustom_env_implementation
diff --git a/mdl_rules.rb b/mdl_rules.rb
index e0089468f..4398b1b44 100644
--- a/mdl_rules.rb
+++ b/mdl_rules.rb
@@ -3,7 +3,6 @@ exclude_rule 'MD003'
 exclude_rule 'MD004'
 exclude_rule 'MD010'
 rule 'MD013', :line_length => 170
-exclude_rule 'MD023'
 exclude_rule 'MD024'
 exclude_rule 'MD025'
 exclude_rule 'MD026'