developer/new-developers/submitting-your-first-patch: cleanup

Follow up to patch: https://review.jami.net/c/jami-docs/+/30004

Change 2 consecutive newlines to 1 newline as per SFL convention.

Change-Id: I568b568de6f5e601ae0cebab410626a098067857

developer/new-developers/submitting-your-first-patch.md

@@ -1,16 +1,13 @@
 # Submitting your first patch
 
-
 ## Setting up Git and SSH
 
 (**To work smoothly with Gerrit.**)
 
-
 First see:
 
 * [Creating a gerrit review](working-with-gerrit)
 
-
 ### SSH setup
 
 <https://review.jami.net/Documentation/user-upload.html#ssh>
@@ -30,7 +27,6 @@ Your public key has been saved in `jami_gerrit_review.pub`.
 3. Set up your local SSH (via `ssh-add` or in `~/.ssh/config`)
 4. Test all of the above (SSH on the service or just try to clone a repo on Gerrit via SSH)
 
-
 ### Your Repository
 
 This *assumes* you have moved any existing project clone out of the way.
@@ -44,13 +40,12 @@ A shell script, to be installed to .git/hooks/commit-msg.
 
 The script creates a unique Change_Id:hash for each commit made from your repository.
 
-- The first time you attempt a _push_ to review `git push origin HEAD:refs/for/master`,
+* The first time you attempt a _push_ to review `git push origin HEAD:refs/for/master`,
   gerrit will notice a lack of Change-Id.
 
-- Gerrit will also present a secure copy (scp) string.
+* Gerrit will also present a secure copy (scp) string.
   Use *that* to download a copy of .git/hooks/commit-msg.
 
-
 ## References
 
-+ [Some Gritty Details](https://review.jami.net/Documentation/user-upload.html#_gritty_details)
++ [Some Gritty Details](https://review.jami.net/Documentation/user-upload.html#_gritty_details)