changes syntax highlight to be abble to put double asterisk

tutos/git.txt

@@ -35,6 +35,7 @@
 **git config --global credential.helper store** store the passwords in .git-credentials in the HOME directory (thanks to global, as opposed to the project directory) so you don't have tot type it each time
 **git config --global core.editor "vim"** change the git editor for vim
 **git cherry-pick NAME_OF_BRANCH** it merge a branch into the actual one, but only with the last commit
+**git --squash** https://stackoverflow.com/questions/23616706/git-squash-and-merge
 **git log --graph** show the graph of the commits with branchs
 **git log --first-parent master** show all the commits directly on master (or other branch)
 **relier dossier sur serveur en local avec git**