[Development] git submodules

[Jiergir Ogoerg]

Hi,
the Qt tutorials that explain how to use git don't mention git submodules.

Is that why after doing changes to some source file "git diff" doesn't
show the changes as expected from reading this:
http://qt-project.org/wiki/Git_Introduction

I'm working with the files from
qt5/qtbase/src/plugins/platforminputcontexts/compose/generator/


What commands in git do I have to issue after updating those files for
them to show up in "git diff"?

Git commit doesn't work either btw.