long time ago I created a git repo for my project where I stored all my sourcecodes. Then I created another repo for the documentation. Now when I look back, it was a stupid idea to separate them in 2 different repos. So now I want to merge these 2 repos with their complete history into one repo with each of them in a subfolder:
/myprojectname/
/sourcecode/
/documentation/
Is it possible to do this? And how?