Update dev_guide.md

docs/src/devdocs/dev_guide.md

@@ -17,9 +17,11 @@ continuing stability of releases. Before making a release one should
 4. Release via the [registration
    issue](https://github.com/SciML/JumpProcesses.jl/issues/73) with the
    command:
-    ```julia
+
+    ```
     @JuliaRegistrator register branch=release-15.0.0
     ```
+
     modifying as appropriate for the version you are releasing.
 
 If there is subsequently a need to increment the version of a dependency, this
@@ -30,4 +32,4 @@ dependency being updated is a non-breaking release, and would have automatically
 been installed by the package resolver had it not been capped, a patch release
 should be preferred. If the new release branch is branched from master, *it
 needs to ensure Project.toml caps are all ≥ to those listed in the previous
-Catalyst release branch*.
+Catalyst release branch*.