Apply suggestions from code review

Co-authored-by: Stefan Verhoeven <stefan.verhoeven@gmail.com>

Author: eriktks

ADD_TO_EXISTING_PACKAGE.md

@@ -1,17 +1,19 @@
 # Add your existing code to directory generated by the NLeSC Python template
 
+The following steps require you existing code to be in a GitHub repository already.
+
 1. Follow the [instructions to create a new package](https://github.com/NLeSC/python-template#how-to-use) with the Python template, while answering the questions like you would for the existing package.
 
-2. Create a Git structure for the new directory: (replace the capitalized name by your own)
+2. Create a Git structure for the new directory: (replace  `<NEW_DIRECTORY>` with directory name you used during cookiecutter questionnaire)
 ```shell
-$ cd NEW_DIRECTORY
+$ cd <NEW_DIRECTORY>
 $ git init
 $ git add --all
-$ git commit -m "first commit"
+$ git commit -m "Added code generated by cookiecutter"
 $ git branch -M main
 ```
 
-3. Import the existing repository from Github (Replace `<ORGANIZATION>` with your GitHub organization name , `REPOSITORY` with your GitHub repository name and `<BRANCH>` with your default branch for example `main` or `master`):
+3. Import the existing repository from GitHub (Replace `<ORGANIZATION>` with your GitHub organization name , `<REPOSITORY>` with your GitHub repository name and `<BRANCH>` with your default branch for example `main` or `master`):
 ```shell
 $ git remote add -f existing_code https://github.com/<ORGANIZATION>/<REPOSITORY>
 $ git fetch existing_code
@@ -22,6 +24,6 @@ $ git merge existing_code/<BRANCH> --allow-unrelated-histories
 5. Add all the files to GitHub:
 ```shell
 $ git add --all
-$ git commit -m "Merged existing code with code generated by `cookiecutter https://github.com/NLeSC/python-template`"
+$ git commit -m "Merged existing code with code generated by cookiecutter"
 $ git push
 ```