Clarify the repo choice in the contribution guidelines

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index a250333704d6d9803b81b6bf85694ea2b61ddd1c..d07d7f62d4a3b5382ae08e78f549bdf59c013d66 100644 (file)
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -7,7 +7,9 @@ helping to manage issues, etc.
 
 The Hugo community and maintainers are [very active](https://github.com/gohugoio/hugo/pulse/monthly) and helpful, and the project benefits greatly from this activity. We created a [step by step guide](https://gohugo.io/tutorials/how-to-contribute-to-hugo/) if you're unfamiliar with GitHub or contributing to open source projects in general.
 
-*Note that this repository only contains the actual source code of Hugo. For documentation-related pull requests / issues please refer to the [hugoDocs](https://github.com/gohugoio/hugodocs) repository.*
+*Note that this repository only contains the actual source code of Hugo. For **only** documentation-related pull requests / issues please refer to the [hugoDocs](https://github.com/gohugoio/hugodocs) repository.*
+
+*Pull requests that contain changes on the code base **and** related documentation, e.g. for a new feature, shall remain a single, atomic one.*
 
 ## Table of Contents